Three colleagues spent a total of $86. Tammy spent $5 more than Elyse and Kathy spent $7 more than Tammy.
- How much money did Elyse spend?
- How much money did Kathy spend?
(a)
Amount that Elyse spent = 1 u
Amount that Tammy spent = 1 u + 5
Amount that Kathy spent = 1 u + 5 + 7 = 1 u + 12
Total amount that they spent
= 1 u + 1 u + 5 + 1 u + 12
= 3 u + 17
3 u + 17 = 86
3 u = 86 - 17
3 u = 69
1 u = 69 ÷ 3 = $23
Amount that Elyse spent
= 1 u
= 23
(b)
Amount that Kathy spent
= 1 u + 12
= 23 + 12
= $35
Answer(s): (a) $23; (b) $35
