Problema Solution
The ratio of the number of cupbcakes to tarts to pies in a bakery was 4:3:1. When 25 cupcakes were sold and another 15 pies were baked, the ratio of the numbber of cupcakes to tarts to pies became 7:9:6. If there was no change in the number of tarts, how many cupcakes were in the bakery at first?
Answer provided by our tutors
At first,
cupbcakes: 4x
tarts: 3x
pies: x
Then
cupbcakes: 4x-25
tarts: 3x
pies: x+15
so
(4x-25):3x:(x+15)= 7:9:6
We solve it
x = 15
So
At first,
cupbcakes: 60