The father

The father is 3 times older than his son. 10 years ago, a father was 7 times older than his son. How old are father and son?

Correct result:

o =  45
s =  15

Solution:


o=3s
o-10 = 7(s-10)

o=3•s
o-10 = 7•(s-10)

o-3s = 0
o-7s = -60

o = 45
s = 15

Our linear equations calculator calculates it.



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