Three friends go out to dinner and pay different amounts. John pays $4 more than Juan and Jenna pays twice as much as John. If the bill comes to $60, how much did each person pay?
Let
x = Juan's share
x+4 = John's share
2(x+4) = Jenna's share
so, add 'em up to 60, solve for x, and then you can figure the shares.