math
posted by Wes .
I borrowed money from Joe. I spent 5.50 of it on lunch, and half of the rest on a present. To repay Joe, I borrowed 10.00 from Fred. If i started and ended with no money, how much did I borrow from Joe?

Let x = borrowed money.
x  5.50  .5(x5.50) = 10
Solve for x.