document.write( "Question 1136563: Four years ago a man was 6times as old as his son.In twelve years time the man will be twice as old as his son.find their present ages.
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Four years ago a man was 6times as old as his son.In twelve years time the man will be twice as old as his son.find their present ages.
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Let the man's age be M, and the son's, S
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document.write( "Then we get: M - 4 = 6(S - 4)_____M - 4 = 6S - 24_____M = 6S - 20 ------- eq (i)
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document.write( "Also, M + 12 = 2(S + 12)_____M + 12 = 2S + 24_____M = 2S + 12 ------ eq (ii)
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document.write( "6S - 20 = 2S + 12 ------ Equating the two M values
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document.write( "6S - 2S = 12 + 20
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document.write( "4S = 32
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