Algebra/fraction question

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Algebra/fraction question

by ctgambler » Mon Jun 15, 2009 2:00 pm
if 7/X + 2/Y = 7 and xy=4, then 7Y + 2X = ?

can someone explain the quick way to solving this equation.

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by dmateer25 » Mon Jun 15, 2009 5:37 pm
7/X + 2/Y = 7

(7y + 2x)/xy = 7
7y + 2x = 7xy
7y + 2x = 7(4)
7y + 2x = 28