Question

Rajesh tells his son seven years ago i was seven times as old as you were then also three years from now , i shall be three times as old as you will be elimination method

Answer 1

Answer:

let the age of Rajesh=x

let the age of his son=y

x-7=7(y-7)

x-7=7y-49

x-7y=-49+7

x-7y=-42------1

x+3=3(y+3)

x+3=3y+9

x-3y=9-3

x-3y=6---------2

By elimination method

x-7y=-42

x-3y=6

(-)(+)(-)

-4y=-48

y=-48/-4

y=12

Now substituting the value of eq. 2

x-3y=6(in place of y we have to write 12)

x-3(12)=6

x-36=6

x=6+36

x=42

the present age of Rajesh = 42 yrs.

the present age of his son =12yrs.

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