present age of a boy is ( x + 7) year then his age before 10 years was
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present age = x+7
before 10 years = x
before age = x-x+7
= 7 years
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present age of a boy is (x-7) years. AFTER 10 YEARS His age =10(x-7) =( 10x-70) years. HOPE IT HELPS YOU MARK AS brainlylist follow me thanks my all answers please
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