Write and solve an equation to answer the question. "18 is 32% of what number w"

7x+8y=-18, 4x-9y=-3 solve the system of equations

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

For which pair of functions is (gof)(a)=|a|-2?