john is now 15 years older than his younger brother sanjay. ten years from now, john will be twicw as old as sanjay. find the present age of them.
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let johns age be x
let sanjays age be x-15
so
x+10=2(x-15)
x+10=2x-30
40=2x-x
x=40
let sanjays age be x-15
so
x+10=2(x-15)
x+10=2x-30
40=2x-x
x=40
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