The present age of the father is three times
than that of his son. After three years the
age of the father will be 7 years more than
twice the age of the son. The present age of
the son is ------- years.
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father's age=x yrs
son's age= y yrs
according to first condition,
x=3y
according to second condition,
x+3=2(y+3)+7
x+3=2y+6+7
put x =3y
3y+3=2y+13
y= 10
x = 30
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