Oliver, Ryan and Xavier went shopping. Oliver and Ryan spent a total of $245. Oliver and Xavier spent $644 altogether. Xavier spent 4 times as much as Ryan.
- How much did Ryan spend?
- How much did Oliver spend?
(a)
Amount that Oliver spent = O
Amount that Ryan spent = R
Amount that Xavier spent = X
O + X = 644
O + R = 245
R = 1 u
X = 4 x 1 u = 4 u
Amount that Xavier spent more than Ryan
= 4 u - 1 u
= 3 u
3 u = 644 - 245
3 u = 399
1 u = 399 ÷ 3 = 133
Amount that Ryan spent
= 1 u
= $133
(b)
Amount that Oliver spent
= 245 - 133
= $112
Answer(s): (a) $133; (b) $112