Three schoolmates spent a total of $70. Gillian spent $8 more than Zara and Opal spent $9 more than Gillian.
- How much money did Zara spend?
- How much money did Opal spend?
(a)
Amount that Zara spent = 1 u
Amount that Gillian spent = 1 u + 8
Amount that Opal spent = 1 u + 8 + 9 = 1 u + 17
Total amount that they spent
= 1 u + 1 u + 8 + 1 u + 17
= 3 u + 25
3 u + 25 = 70
3 u = 70 - 25
3 u = 45
1 u = 45 ÷ 3 = $15
Amount that Zara spent
= 1 u
= 15
(b)
Amount that Opal spent
= 1 u + 17
= 15 + 17
= $32
Answer(s): (a) $15; (b) $32
