What is the solution to 1-(x-3)/3 ≤ 1/2?

  • MHB
  • Thread starter alg
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In summary, to solve the inequality $1 - \dfrac{x-3}{3} \le \dfrac{1}{2}$, we first multiply both sides by the common denominator of $6$ to eliminate fractions. This results in $6 - 2(x-3) \le 3$. Simplifying, we get $-2x - 6 \le -3$. To isolate $x$, we add $6$ to both sides, giving us $-2x \le 3$. Dividing both sides by $-2$ and flipping the inequality sign, we get the solution $x \ge \dfrac{3}{2}$. However, we must also consider what happens when we divide
  • #1
alg
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  • #2
$1 - \dfrac{x-3}{3} \le \dfrac{1}{2}$

multiply every term by the common denominator, $6$ ...

$6 - 2(x-3) \le 3$

can you finish it?
 
  • #3
Yes, thank you

-2x - 6 ≤ -3
-2x ≤ -9
x ≤ 9/2
 
  • #4
frctl said:
Yes, thank you

-2x - 6 ≤ -3
-2x ≤ -9
x ≤ 9/2

... what happens when you divide both sides of an inequality by a negative number ?
 
  • #5
frctl said:
Yes, thank you

-2x - 6 ≤ -3
-2x ≤ -9
x ≤ 9/2
If x= -2 then x is certainly less than 9/2= 4 but -2x- 6= 4- 6= -2 is not less than -3 so that can't be right.
 
  • #6
Correction

6 - 2(x - 3) ≤ 3
-2x - 6 ≤ -3
-2x ≤ -3
flip inequality sign
x ≥ 3/2
 
  • #7
frctl said:
Correction

6 - 2(x - 3) ≤ 3
-2x - 6 ≤ -3 should be -2x + 6 < -3
-2x ≤ -3
flip inequality sign
x ≥ 3/2

correction again
 

1. What does the equation 1-(x-3)/3 ≤ 1/2 mean?

The equation 1-(x-3)/3 ≤ 1/2 is an inequality that represents a range of values for x that make the equation true. It is read as "1 minus the quantity (x-3) divided by 3 is less than or equal to 1/2."

2. How do I solve the inequality 1-(x-3)/3 ≤ 1/2?

To solve the inequality, you must isolate the variable x on one side of the inequality symbol. First, you can multiply both sides by 3 to get rid of the fraction. Then, you can simplify the equation to get x-3 ≤ 3/2. Finally, you can add 3 to both sides to get the solution x ≤ 9/2.

3. Can this inequality have more than one solution?

Yes, this inequality can have more than one solution. In this case, the solution is a range of values for x that make the inequality true. In our example, the solution is x ≤ 9/2, which means any value of x that is less than or equal to 9/2 will make the inequality true.

4. How can I graph this inequality?

To graph this inequality, you can start by graphing the line y = 1-(x-3)/3. Then, you can shade the area below the line to represent the values that make the inequality true. In our example, this would be the area below the line y = 1/2. The shaded area will represent the solution to the inequality.

5. What is the significance of solving this inequality?

Solving this inequality can help us understand the range of values for x that make the equation true. It can also help us make decisions or predictions based on the given conditions. In scientific research, solving inequalities can be used to analyze data and make conclusions about relationships between variables.

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