Sarah and Shiyun have $218. Kylie and Sarah have $233. The ratio of Shiyun to Kylie is 2 : 3. How much does Sarah have?
Amount that Shiyun has = 2 u
Amount that Kylie has = 3 u
The amount that Sarah has is the repeated identity.
Sarah + 2 u = 218 --- (1)
Sarah + 3 u = 233 --- (2)
(2) - (1)
3 u - 2 u = 233 - 218
1 u = 15
From (1):
Sarah + 2 u = 218
Sarah + 2 x 15 = 218
Sarah + 30 = 218
Amount that Sarah has
= 218 - 30
= $188
Answer(s): $188
