document.write( "Question 84143: Solve the system by substitution \r
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document.write( "5x+2y=-15
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document.write( " y=2x-12 \n" );
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Algebra.Com's Answer #60593 by funmath(2933)![]() ![]() ![]() You can put this solution on YOUR website! Solve the system by substitution \r \n" ); document.write( "\n" ); document.write( "5x+2y=-15 R1 \n" ); document.write( " y=2x-12 R2 \n" ); document.write( "Let y=(2x-12) in R1 and solve for x \n" ); document.write( "5x+2(2x-12)=-15 \n" ); document.write( "5x+4x-24=-15 \n" ); document.write( "9x-24=-15 \n" ); document.write( "9x-24+24=-15+24 \n" ); document.write( "9x=9 \n" ); document.write( "9x/9=9/9 \n" ); document.write( "x=1 \n" ); document.write( "Let x=1 in R2 and solve for y \n" ); document.write( "y=2(1)-12 \n" ); document.write( "y=2-12 \n" ); document.write( "y=-10 \n" ); document.write( "The solution to the system is (x,y)=(1,-10) \n" ); document.write( "Happy Calculating!!!! \n" ); document.write( " |