Question

Question 11 of 20 : Select the best answer for the question. 11. Find the value of x in the equation 2(x – 3) + 5x = 5(2x + 6). A. 2 B. –12 C. 12 D. –2

Answer 1

I got -12

2(x-3)+5x=5(2x+6)
2x-6+5x=10x+30
7x-6=10x+30
-3x=36

Answer 2

To answer this question, you need to know the rules to move a number to the left or right side of the equal sign. To solve this, you need to move all the x into one side, and then move the number into another side. The calculation would look like this:


2(x – 3) + 5x = 5(2x + 6)
2x -6 +5x = 10x +30
2x+ 5x - 10x = 30 +6
-3x= 36
x= 36/-3= -12