Question 1203330
<br>
Luke spent all his money, so the money they had left together was Ahmad's.<br>
Ahmad spent 3/5 of his money, so he had 2/5 of his money left; the amount they had left together was $400-$280 = $120.<br>
let x = amount Ahmad started with<br>
(2/5)x = 120
x = (5/2)120 = 300<br>
Ahmad started with $300 and ended with $120, so he spent $180.<br>
ANSWER: $180<br>