Mother and daughter

The ratio of years mother and daughter is 5:2. After 7 years the ratio is 2: 1. How many years ago daughter was born?

Result

d =  14

Solution:


2m = 5d
1(m+7) = 2(d+7)

5d-2m = 0
2d-m = -7

d = 14
m = 35

Calculated by our linear equations calculator.








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