Julie and Xuan have $347. Cindy and Julie have $383. The ratio of Xuan to Cindy is 4 : 7. How much does Julie have?
Amount that Xuan has = 4 u
Amount that Cindy has = 7 u
The amount that Julie has is the repeated identity.
Julie + 4 u = 347 --- (1)
Julie + 7 u = 383 --- (2)
(2) - (1)
7 u - 4 u = 383 - 347
3 u = 36
1 u = 36 ÷ 3 = 12
From (1):
Julie + 4 u = 347
Julie + 4 x 12 = 347
Julie + 48 = 347
Amount that Julie has
= 347 - 48
= $299
Answer(s): $299
