document.write( "Question 253668: If x=2y+3 and 4x-5y=9,what is the value of y?
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Algebra.Com's Answer #186011 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! x=2y+3 \n" ); document.write( "x-2y=3 now multiply this equation by -4 & add. \n" ); document.write( "4x-5y=9 \n" ); document.write( "-4x+8y=-12 \n" ); document.write( "--------------- \n" ); document.write( "3y=-3 \n" ); document.write( "y=-1 ans. \n" ); document.write( "x=2*-1=3 \n" ); document.write( "x=-2+3 \n" ); document.write( "x=1 ans. \n" ); document.write( "Proof: \n" ); document.write( "4*1-5*-1=9 \n" ); document.write( "4+5=9 \n" ); document.write( "9=9 \n" ); document.write( " |