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Question

If x:y=8:9, then find (7x4y):(3x+2y).

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Solution

xy=89
7x4y3x+2y=y(7xy4)y(3xy+2)
=7xy43xy+2
=7×8943×89+2
=5694249+2
=5636924+189
=563624+18=2042=1021

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