Tiffany and Barbara have $266. Abi and Tiffany have $285. The ratio of Barbara to Abi is 3 : 4. How much does Tiffany have?
Amount that Barbara has = 3 u
Amount that Abi has = 4 u
The amount that Tiffany has is the repeated identity.
Tiffany + 3 u = 266 --- (1)
Tiffany + 4 u = 285 --- (2)
(2) - (1)
4 u - 3 u = 285 - 266
1 u = 19
From (1):
Tiffany + 3 u = 266
Tiffany + 3 x 19 = 266
Tiffany + 57 = 266
Amount that Tiffany has
= 266 - 57
= $209
Answer(s): $209
