document.write( "Question 592057: Please, solve this system using elimination.\r
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document.write( "3x + 5y = -18
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document.write( "4x - 10y = -21\r
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Algebra.Com's Answer #375822 by mananth(16946)![]() ![]() You can put this solution on YOUR website! 3 x + 5 y = -18 .............1 \n" ); document.write( "4 x -10 y = -21 .............2 \n" ); document.write( "Eliminate y \n" ); document.write( "multiply (1)by 2 \n" ); document.write( "Multiply (2) by 1 \n" ); document.write( "6 x 10 y = -36 \n" ); document.write( "4 x -10 y = -21 \n" ); document.write( "Add the two equations \n" ); document.write( "10 x = -57 \n" ); document.write( "/ 10.00 \n" ); document.write( "x = -5.70 \n" ); document.write( "plug value of x in (1) \n" ); document.write( "3.00 x + 5.00 y = -18.00 \n" ); document.write( "-17.10 + 5.00 y = -18.00 \n" ); document.write( " 5.00 y = -18.00 + 17.10 \n" ); document.write( " 5.00 y = -0.90 \n" ); document.write( " y = -0.18 \n" ); document.write( " \n" ); document.write( " |