Question

A rectangle has a length of 5x-15 and a length of 2x+7. What is the perimeter of the rectangle?​

Answer 1

14x-16

you must add two of each length together and thats your answer bebe :)

Answer 2

2(5x-15) + 2(2x+7) = 0
10x-30+4x+14 = 0
14x = 16
x = 8/7