Wendy and Ivory have $220. Nora and Wendy have $240. The ratio of Ivory to Nora is 3 : 4. How much does Wendy have?
Amount that Ivory has = 3 u
Amount that Nora has = 4 u
The amount that Wendy has is the repeated identity.
Wendy + 3 u = 220 --- (1)
Wendy + 4 u = 240 --- (2)
(2) - (1)
4 u - 3 u = 240 - 220
1 u = 20
From (1):
Wendy + 3 u = 220
Wendy + 3 x 20 = 220
Wendy + 60 = 220
Amount that Wendy has
= 220 - 60
= $160
Answer(s): $160
