Answers

2014-04-10T15:24:54+05:30
His brother age ten years ago x years now present age of his bro is 20yars
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2014-04-10T15:26:34+05:30
Let the age of brother be y
before 10 years
y-10=2(x-10)=2x-20
So his brothers age before 10 years was 2x-20 and at present it is 2x-10
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