if present age of son and father are expressed by x and y reyears father spectivily and after ten years father will be twice as old as his son .write the relation between x and y
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present son x father y
after ten yrs y+10= 2(x+10)
y+10=2x+20
2x-y+10=20
or
y=2x+10
after ten yrs y+10= 2(x+10)
y+10=2x+20
2x-y+10=20
or
y=2x+10
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