Question

What is the solution to this equation?

5x+15 + 2x = 24 +4x
A. x = 3
B. x=9/11
C. x = 13
D. x =39/11

Answer 1

A. x = 3

Explanation:

5x+15 + 2x = 24 +4x

7x+15=24+4x

7x+15-15=24+4x-15

7x=4x+9

7x-4x=4x+9-4x

3x=9

3x/3=9/3

x=3

Answer 2

Answer A is correct

Explanation:

5x + 15 + 2x = 24 + 4x

Take 4x to left side.

5x + 15 + 2x - 4x = 24

Take 15 to right side.

5x + 2x - 4x = 24 - 15

Combine like terms.

3x = 9

Divide both sides by 3.

x = 3