posted by natasya .
sally and susan had an equal amount of oney each. after sally spent $15 and susan spent $24, the ratio of sally's money to susan's money was 4:3. how much money did each girl have at first?
let the starting amounts be x and y
x = y
(x-15)/(y-24) = 4/3
(51-15)/(51-24) = 36/27 = 4/3