document.write( "Question 256808: Please help me solve this problem of System of equation by substitution.
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document.write( "3x+2y=11
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document.write( " 2x-y=7
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document.write( " i need to solve for X and y\r
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document.write( "I also need to solve a problem of system of equation by Elimination.
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document.write( "5x-y=13
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document.write( "2x-3y=12\r
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document.write( "i need to solve for X and Y \n" );
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Algebra.Com's Answer #188872 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! 3x+2y=11 \n" ); document.write( "2x-y=7 OR -Y=-2X+7 OR Y=2X-7 \n" ); document.write( "NOW REPLACE Y IN THE FIRST EQUATION WITH (2X-7) \n" ); document.write( "3X+2(2X-7)=11 \n" ); document.write( "3X+4X-14=11 \n" ); document.write( "7X=11+14 \n" ); document.write( "7X=25 \n" ); document.write( "X=25/7 ANS. \n" ); document.write( "2*25/7-Y=7 \n" ); document.write( "50/7-Y=7 \n" ); document.write( "-Y=7-50/7 \n" ); document.write( "-Y=49/7-50/7 \n" ); document.write( "-Y=-1/7 \n" ); document.write( "Y=1/7 ANS.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |