document.write( "Question 168978: 15x-10y=-5\r
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document.write( "15y=4+5x \n" );
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Algebra.Com's Answer #124647 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! 15y=4+5x or -5x+15y=4 now multiply this equation by 3 & add them \n" ); document.write( "15x-10y=-5 \n" ); document.write( "-15x+45y=12 \n" ); document.write( "--------------------- \n" ); document.write( "35y=7 \n" ); document.write( "y=7/35 \n" ); document.write( "y=1/5 ans. \n" ); document.write( "15x+45*1/5=12 \n" ); document.write( "15x+9=12 \n" ); document.write( "15x=12-9 \n" ); document.write( "15x=3 \n" ); document.write( "x=3/15 \n" ); document.write( "x=1/5 ans. \n" ); document.write( "Proof: \n" ); document.write( "15*1/5=4-5*1/5 \n" ); document.write( "15/5=4-5/5 \n" ); document.write( "3=4-1 \n" ); document.write( "3=3\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |