Kylie and Xuan have $168. Tiffany and Kylie have $178. The ratio of Xuan to Tiffany is 3 : 4. How much does Kylie have?
Amount that Xuan has = 3 u
Amount that Tiffany has = 4 u
The amount that Kylie has is the repeated identity.
Kylie + 3 u = 168 --- (1)
Kylie + 4 u = 178 --- (2)
(2) - (1)
4 u - 3 u = 178 - 168
1 u = 10
From (1):
Kylie + 3 u = 168
Kylie + 3 x 10 = 168
Kylie + 30 = 168
Amount that Kylie has
= 168 - 30
= $138
Answer(s): $138
