Oscar, Tom and Peter went shopping. Oscar and Tom spent a total of $216. Oscar and Peter spent $636 altogether. Peter spent 3 times as much as Tom.
- How much did Tom spend?
- How much did Oscar spend?
(a)
Amount that Oscar spent = O
Amount that Tom spent = T
Amount that Peter spent = P
O + P = 636
O + T = 216
T = 1 u
P = 3 x 1 u = 3 u
Amount that Peter spent more than Tom
= 3 u - 1 u
= 2 u
2 u = 636 - 216
2 u = 420
1 u = 420 ÷ 2 = 210
Amount that Tom spent
= 1 u
= $210
(b)
Amount that Oscar spent
= 216 - 210
= $6
Answer(s): (a) $210; (b) $6