Three sisters spent a total of $55. Cathy spent $6 more than Abi and Marion spent $7 more than Cathy.
- How much money did Abi spend?
- How much money did Marion spend?
(a)
Amount that Abi spent = 1 u
Amount that Cathy spent = 1 u + 6
Amount that Marion spent = 1 u + 6 + 7 = 1 u + 13
Total amount that they spent
= 1 u + 1 u + 6 + 1 u + 13
= 3 u + 19
3 u + 19 = 55
3 u = 55 - 19
3 u = 36
1 u = 36 ÷ 3 = $12
Amount that Abi spent
= 1 u
= 12
(b)
Amount that Marion spent
= 1 u + 13
= 12 + 13
= $25
Answer(s): (a) $12; (b) $25
