Mary and Min have $146. Jaslyn and Mary have $210. The ratio of Min to Jaslyn is 1 : 5. How much does Mary have?
Amount that Min has = 1 u
Amount that Jaslyn has = 5 u
The amount that Mary has is the repeated identity.
Mary + 1 u = 146 --- (1)
Mary + 5 u = 210 --- (2)
(2) - (1)
5 u - 1 u = 210 - 146
4 u = 64
1 u = 64 ÷ 4 = 16
From (1):
Mary + 1 u = 146
Mary + 1 x 16 = 146
Mary + 16 = 146
Amount that Mary has
= 146 - 16
= $130
Answer(s): $130
