The ratio of the ages of father and son at present is 6: 1. After 5 years the ratio will become 7:2. Find the present age of the son?
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let the present age of the father be 6x
let the present age of the son be x
ages after 5 years
the age of the father be 6x+5
the age of the son be x+5
present age of son
6x+5 /x+5=7/2
12x+10=7x +35
12x -7x =35-5
5x = 30
x =6
the present age of son =6 years
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