Square A has a side length (2x-7) and square B has side length (-4x+18) how much bigger is the perimeter of square B than square A?

To make things easier, we can assume a value of x in order to substitute to each expression and obtain the side length of each. We can calculate for perimeter of each square. Then, compare them. We do as follows:

Assume x = 4

Square A

2x - 7 = 2 (4) - 7 = 1

P = 4 (1) = 4

Square B

-4x + 18 = - 4 (4) + 18 = 2

P = 4 (2) = 8

Therefore, the perimeter of B is 2 than the perimeter of A.