# What is Sal khan: Definition and 61 Discussions

2. ### What are variables, expressions, and equations? | Introduction to algebra | Algebra I | Khan Academy

Learn what variables, expressions, and equations really are. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/alg...
3. ### How to test solutions to equations using substitution | 6th grade | Khan Academy

A solution to an equation makes that equation true. Learn how to test if a certain value of a variable makes an equation true. Practice this lesson yourself ...
4. ### Why we do the same thing to both sides of equations | Linear equations | Algebra I | Khan Academy

The example of a scale where we try to achieve balance helps to explain why we do the same thing to both sides of an equation. Practice this lesson yourself ...
5. ### How to represent a relationship with a simple equation | Linear equations | Algebra I | Khan Academy

Equations are about relationships (no, not girlfriends and boyfriends!) between the two sides of the equation. Let's again use a scale example to help us und...
6. ### Intuition for solving one-step equations | Linear equations | Algebra I | Khan Academy

This equation can be simplified through a single step to solve for the variable. Can you help? Practice this lesson yourself on KhanAcademy.org right now: ht...
7. ### How to divide from both sides of an equation | Linear equations | Algebra I | Khan Academy

Let's get a conceptual understanding of why one needs to divide both sides of an equation to solve for a variable. Watch the next lesson: https://www.khanaca...
8. ### How to solve one-step equations | Linear equations | Algebra I | Khan Academy

Learn how to solve one-step addition and subtraction equations by adding or subtracting the same thing from both sides of the equation. Watch the next lesson...
9. ### Example of solving a one-step equation | Linear equations | Algebra I | Khan Academy

Learn how to solve this equation: a + 5 = 54 Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/solving-lin...
10. ### How to solve one-step equations with fractions and decimals | 6th grade | Khan Academy

Learn how to solve one-step addition and subtraction equations that have fractions and decimals in them. Practice this lesson yourself on KhanAcademy.org rig...
11. ### How to solve equations of the form ax = b | Linear equations | Algebra I | Khan Academy

Let's ease into this, shall we? Here's an introduction to basic algebraic equations of the form ax=b. Remember that you can check to see if you have the righ...
12. ### How to solve equations of the form x/a = b | Linear equations | Algebra I | Khan Academy

Remember that what you do to one side, you have to do to the other. Will you multiply or divide both sides to dump the fraction, x/a? Let's do it together. P...
13. ### How to solve one-step multiplication and division equations with fractions and decimals

"Learn how to solve equations in one step by multiplying or dividing a number from both sides. These problems involve decimals and fractions. Practice this l...
14. ### Solving two-step equations | Linear equations | Algebra I | Khan Academy

Here's how we solve a two step equation. It begins with the concept of equality: what we do to one side of the equation must be done to the other. Watch the ...
15. ### Solving a more complicated equation | Linear equations | Algebra I | Khan Academy

This example demonstrates how we solve an equation expressed such: ax + b = c. It's a little more complicated than previous examples, but you can do it! Prac...
16. ### Example: two-step equation with numerator x | Linear equations | Algebra I | Khan Academy

Solve the equation by isolating the term with numerator x. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algeb...
17. ### Basic linear equation word problem | 7th grade | Khan Academy

"Learn how to construct and solve a basic linear equation to solve a word problem. Practice this lesson yourself on KhanAcademy.org right now: https://www.kh...
18. ### Word problem: solving equations | Linear equations | Algebra I | Khan Academy

Here's a nifty word problem in which we find the dimensions of a garden given only the perimeter. Let's create an equation to solve! Practice this lesson you...
19. ### Linear equation word problem | Linear equations | Algebra I | Khan Academy

Learn how to solve a word problem by writing an equation to model the situation. In this video, we use the linear equation 210(t-5) = 41,790. Practice this l...

21. ### Introduction to solving an equation with variables on both sides | Algebra I | Khan Academy

Sal solves the equation 2x + 3 = 5x - 2. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/solving-linear-...
22. ### Example 2: Variables on both sides | Linear equations | Algebra I | Khan Academy

Solving Equations 2 Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequal...
23. ### A clever application of the distributive property to solve a multi-step equation | Khan Academy

Sal solves the equation (3/4)x + 2 = (3/8)x - 4 using the distributive property Practice this lesson yourself on KhanAcademy.org right now: https://www.khana...
24. ### Ex 2: Multi-step equation | Linear equations | Algebra I | Khan Academy

Turning a non-linear equation into a linear one. Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/co...
25. ### Solving equations with the distributive property | Linear equations | Algebra I | Khan Academy

Solving Equations with the Distributive Property Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/solving...
26. ### Number of solutions to linear equations | Linear equations | Algebra I | Khan Academy

Equation Special Cases Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-ineq...
27. ### Equation special cases | Linear equations | Algebra I | Khan Academy

Equation Special Cases Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/solutions-linear-equations/v...

30. ### Solving a consecutive integer problem algebraically | Linear equations | Algebra I | Khan Academy - YouTube

The sum of 4 consecutive odd integers is 136. What are the 4 integers? Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.or...
31. ### Challenge example: Sum of integers | Linear equations | Algebra I | Khan Academy

Sum of Consecutive Odd Integers Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/solving-linear-equations...
32. ### Mixture problems 2 | Linear equations | Algebra I | Khan Academy

Mixture problems 2 Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/More-equation-practice/v/basic-r...
33. ### Mixture problems 3 | Linear equations | Algebra I | Khan Academy

Mixture problems 3 Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/v/order-of-...
34. ### Linear equations with unknown coefficients

Linear equations with unknown coefficients
35. ### Abstract-ness | Introduction to algebra | Algebra I | Khan Academy

The general idea behind the word 'abstract' Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra/overview_hist_alg/v/the-b...
36. ### The beauty of algebra | Introduction to algebra | Algebra I | Khan Academy

Why the abstraction of mathematics is so fundamental Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra/overview_hist_al...
37. ### Introduction to the coordinate plane | Introduction to algebra | Algebra I | Khan Academy

Bridging algebra and geometry. What makes linear equations so linear. Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra...
38. ### Why all the letters in algebra? | Introduction to algebra | Algebra I | Khan Academy

Jesse Roe and Sal Khan talk about why we use letters in algebra Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra/varia...
39. ### What is a variable? | Introduction to algebra | Algebra I | Khan Academy

Our focus here is understanding that a variable is just a symbol that can represent different values in an expression. We got this. Just watch. Watch the nex...
40. ### Why aren't we using the multiplication sign? | Introduction to algebra | Algebra I | Khan Academy

Great question. In algebra, we do indeed avoid using the multiplication sign. We'll explain it for you here. Watch the next lesson: https://www.khanacademy.o...
41. ### How to evaluate an expression with variables | Introduction to algebra | Algebra I | Khan Academy

Learn how to evaluate an expression with variables using a technique called substitution (or "plugging in"). Watch the next lesson: https://www.khanacademy.o...
42. ### How to evaluate expressions with two variables | 6th grade | Khan Academy

We've done a few examples together where we were faced with 1 variable. Why not try one that has 2 variables? Practice this lesson yourself on KhanAcademy.or...
43. ### How to evaluate expressions in two variables with decimals and fractions | 6th grade | Khan Academy

Learn how to evaluate expressions that have two different variables in them by using a technique called substitution (or "plugging in"). Practice this lesson...
44. ### How to evaluate an expression using substitution | Algebra I | Khan Academy

In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degr...
45. ### Evaluating an algebraic expression in a word problem | Algebra I | Khan Academy

In this example of evaluating expressions, we're dusting off some geometry. On top of that, it's a word problem. We're seeing how different concepts in math ...
46. ### Evaluating an algebraic expression with exponents | 6th grade | Khan Academy

We're going to put our order of operations knowledge to work as we evaluate this expression. Exponents, specifically, are our focus here. Watch the next less...