MHB Find the Number When 2 and 12 Subtract the Number are Equal

  • Thread starter Thread starter historywept
  • Start date Start date
  • Tags Tags
    Product
AI Thread Summary
To find the number x where the product of 2 and x equals 12 minus x, the equation 2x = 12 - x is established. By adding x to both sides, the equation simplifies to 3x = 12. Dividing both sides by 3 yields x = 4. Thus, the number that satisfies the condition is 4.
historywept
Messages
2
Reaction score
0
The product of 2 and a number is the same as 12 subtract the number. Find the number.

If you could please help me with this, thank you.
 
Mathematics news on Phys.org
Call that number "x". Then "the product of 2 and a number" is 2x. "12 subtract the number" is 12- x. They are the same: 2x= 12- x.

To solve for x, start by adding x to both sides. What do you get?
 

Thread 'Trigonometry problem of interest'

Seemingly by some mathematical coincidence, a hexagon of sides 2,2,7,7, 11, and 11 can be inscribed in a circle of radius 7. The other day I saw a math problem on line, which they said came from a Polish Olympiad, where you compute the length x of the 3rd side which is the same as the radius, so that the sides of length 2,x, and 11 are inscribed on the arc of a semi-circle. The law of cosines applied twice gives the answer for x of exactly 7, but the arithmetic is so complex that the...
View full post »

Similar threads

MHB How Does Subtracting Negative Numbers Relate to Adding?
Replies
1
Views
1K
I What is the role of geometry and dimensional operations?
Replies
3
Views
2K
MHB Can Seven Integers with a Subtraction of 3 Result in a Product 13 Times Larger?
Replies
6
Views
2K
MHB Sum of Numbers on Cube Faces to Equal 2004
Replies
1
Views
2K
MHB Find Half a Number's Reciprocal Increased by Half its Reciprocal
Replies
2
Views
1K
B What is the formula for this sequence for n-th number
Replies
5
Views
2K
I Needing Direction: Showing Progress Over Time with Small Numbers
Replies
17
Views
2K
B Difference between powers of numbers equaling 1
Replies
11
Views
2K
I Modulo and Modulus in math and computer programming
Replies
5
Views
3K
A Ramanujan Summation, Variations of
Replies
7
Views
2K

Hot Threads

Recent Insights

Back
Top