document.write( "Question 60133This question is from textbook Elementary and Intermediate Algebra
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document.write( ": To Whomever can assist, Thank you!
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document.write( "This has to do with the elimination by addition method and I'm unsure of how to solve for the system.\r
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document.write( "x - 2y = -12
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document.write( "2x + 9y = 2 \n" );
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Algebra.Com's Answer #41284 by funmath(2933)![]() ![]() ![]() You can put this solution on YOUR website! E1: x - 2y = -12 \n" ); document.write( "E2: 2x + 9y = 2 \n" ); document.write( "Mutiply E1 by -2 and add E1+E2 and the x's will be eliminated leaving you able to solve for y. \n" ); document.write( "E1: -2(x-2y)=-2(-12) ---> -2x+4y=24 \n" ); document.write( ": \n" ); document.write( "-2x+4y=24 \n" ); document.write( "2x+9y=2 \n" ); document.write( "__________ \n" ); document.write( "0+13y=26 \n" ); document.write( "13y=26 \n" ); document.write( "13y/13=26/13 \n" ); document.write( "y=2 \n" ); document.write( ": \n" ); document.write( "Substitute 2 in for y in either equation and solve for x: \n" ); document.write( "x-2(2)=-12 \n" ); document.write( "x-4=-12 \n" ); document.write( "x-4+4=-12+4 \n" ); document.write( "x=-8 \n" ); document.write( "The solution is: (x,y)=(-8,2) \n" ); document.write( "Happy Calculating!!! \n" ); document.write( " |