Mother and son

Mother is four times older than her son. In 16 years, the son will be two times younger than his mother. How many years are mother and son?

Correct result:

m =  32
s =  8

Solution:


m=4s
m+16 = 2•(s+16)

m=4•s
m+16 = 2•(s+16)

m-4s = 0
m-2s = 16

m = 32
s = 8

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