Dana and Mary have $162. Jaslyn and Dana have $179. The ratio of Mary to Jaslyn is 3 : 4. How much does Dana have?
Amount that Mary has = 3 u
Amount that Jaslyn has = 4 u
The amount that Dana has is the repeated identity.
Dana + 3 u = 162 --- (1)
Dana + 4 u = 179 --- (2)
(2) - (1)
4 u - 3 u = 179 - 162
1 u = 17
From (1):
Dana + 3 u = 162
Dana + 3 x 17 = 162
Dana + 51 = 162
Amount that Dana has
= 162 - 51
= $111
Answer(s): $111
