Tiffany and Xylia have $113. Natalie and Tiffany have $126. The ratio of Xylia to Natalie is 1 : 2. How much does Tiffany have?
Amount that Xylia has = 1 u
Amount that Natalie has = 2 u
The amount that Tiffany has is the repeated identity.
Tiffany + 1 u = 113 --- (1)
Tiffany + 2 u = 126 --- (2)
(2) - (1)
2 u - 1 u = 126 - 113
1 u = 13
From (1):
Tiffany + 1 u = 113
Tiffany + 1 x 13 = 113
Tiffany + 13 = 113
Amount that Tiffany has
= 113 - 13
= $100
Answer(s): $100
