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2014-03-24T20:34:49+05:30

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Let age of hemant today = x
     
age of his son = y
From question
(x + 5 ) = 3(y +5)
x - 3y = 10 ------------1
And,
(x - 5) = 7 (y- 5)
x - 7y = - 30    ----- 2
equation 1 - equation 2
4y = 40
y = 10
put this value in equation 1 we get
x - 30 = 10
x = 40
So age of hemant today = 40
    age of his son  = 10



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