document.write( "Question 114905:
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document.write( "3x-y=5
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document.write( "2x+y=15\r
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document.write( "Solve each of the following systems of equations using the method of substitution. If the system is inconcistent or dependent, say no.\r
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document.write( "I am needing a bit of refresher on this. I have been away from it too long. Can you help please. Thanks. \n" );
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Algebra.Com's Answer #83578 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! ARE YOU SURE THERE ISN'T AN = SIGN IN THE SECOND EQUATION??????? \n" ); document.write( "3X-Y=5 OR -Y=-3X+5 OR Y=3X-5 NOW SUBSTITUTE (3X-5) FOR Y IN THE OTHER EQUATION. \n" ); document.write( "2X+(3X-5)=15 \n" ); document.write( "2X+3X-5=15 \n" ); document.write( "5X=15+5 \n" ); document.write( "5X=20 \n" ); document.write( "X=20/5 \n" ); document.write( "X=4 ANSWER. \n" ); document.write( "3*4-Y=5 \n" ); document.write( "12-Y=5 \n" ); document.write( "-Y=5-12 \n" ); document.write( "-Y=-7 \n" ); document.write( "Y=7 ANSWER. \n" ); document.write( "PROOF \n" ); document.write( "2*4+7=15 \n" ); document.write( "8+7=15 \n" ); document.write( "15=15 \n" ); document.write( " |