The sum of the ages of father and son is 45 years. Five years ago the product of theri ages was 4 times the father's age at that time the present ages of father and son are?
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let father's age be x and son's age be y
x + y = 45 (GIVEN)
sum of their ages five ages 5 years ago = 35
xy = 4x
y = 4
present age of son 4+5 = 9
present age of father 45 - 9 = 36
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