Zara and Kimberly have $181. Emily and Zara have $201. The ratio of Kimberly to Emily is 3 : 5. How much does Zara have?
Amount that Kimberly has = 3 u
Amount that Emily has = 5 u
The amount that Zara has is the repeated identity.
Zara + 3 u = 181 --- (1)
Zara + 5 u = 201 --- (2)
(2) - (1)
5 u - 3 u = 201 - 181
2 u = 20
1 u = 20 ÷ 2 = 10
From (1):
Zara + 3 u = 181
Zara + 3 x 10 = 181
Zara + 30 = 181
Amount that Zara has
= 181 - 30
= $151
Answer(s): $151
