# SOLUTION: Solve each system by the substitution method: #42 7y=9x -3x=4y

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 Question 72859This question is from textbook Intermediate Algebra : Solve each system by the substitution method: #42 7y=9x -3x=4y This question is from textbook Intermediate Algebra Answer by checkley75(3666)   (Show Source): You can put this solution on YOUR website!7Y=9X Y=9X/7 NOW SUBSTITUTE (9X/7) FOR Y & SOLVE FOR X -3X=4*9X/7 -3X=36X/7 NBOW CROSS MULTIPLY -3X*7=36X -21X=36X (X MUST =0) THEN Y=0 ALSO