Ali and Ben shared a total cost of a present. Ali paid $15 more than 3/8 of the cost of the present. Ben paid $25. How much did the present cost?
Set total cost of present = x
Ali = 15+3/8x
Ben = 25
That means 40+3/8x = x, 40 = 5/8x, simplifying gets us x = 64, which is the cost of the present.