Daniel, Riordan and Billy went shopping. Daniel and Riordan spent a total of $291. Daniel and Billy spent $675 altogether. Billy spent 9 times as much as Riordan.
- How much did Riordan spend?
- How much did Daniel spend?
(a)
Amount that Daniel spent = D
Amount that Riordan spent = R
Amount that Billy spent = B
D + B = 675
D + R = 291
R = 1 u
B = 9 x 1 u = 9 u
Amount that Billy spent more than Riordan
= 9 u - 1 u
= 8 u
8 u = 675 - 291
8 u = 384
1 u = 384 ÷ 8 = 48
Amount that Riordan spent
= 1 u
= $48
(b)
Amount that Daniel spent
= 291 - 48
= $243
Answer(s): (a) $48; (b) $243