document.write( "Question 440651: Solve this:
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document.write( "x-3y=8,4x+y=6 by substitution\r
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document.write( "thank you \n" );
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Algebra.Com's Answer #304331 by mananth(16946)![]() ![]() You can put this solution on YOUR website! x-3y=8 .............1 \n" ); document.write( "y=6-4x ---------2 \n" ); document.write( "y=6-4x \n" ); document.write( "Plug the value of y in (1) \n" ); document.write( "x-3(6-4x)=8 \n" ); document.write( "x-18+12 x= 8 \n" ); document.write( "x+12x=8+18 \n" ); document.write( "13x=26 \n" ); document.write( "/13 \n" ); document.write( "x=2 \n" ); document.write( "Plug the value of x in (1) \n" ); document.write( "x -3y=8 \n" ); document.write( "1*2-3y=8 \n" ); document.write( "2-3y=8 \n" ); document.write( "-3y=6 \n" ); document.write( "/-3 \n" ); document.write( "y=-2 \n" ); document.write( " \n" ); document.write( " |