Nora and Tammy have $268. Cindy and Nora have $308. The ratio of Tammy to Cindy is 3 : 5. How much does Nora have?
Amount that Tammy has = 3 u
Amount that Cindy has = 5 u
The amount that Nora has is the repeated identity.
Nora + 3 u = 268 --- (1)
Nora + 5 u = 308 --- (2)
(2) - (1)
5 u - 3 u = 308 - 268
2 u = 40
1 u = 40 ÷ 2 = 20
From (1):
Nora + 3 u = 268
Nora + 3 x 20 = 268
Nora + 60 = 268
Amount that Nora has
= 268 - 60
= $208
Answer(s): $208
