document.write( "Question 578490: Write and or solve the system of equations using any method.\r
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document.write( ".2x-.5y=-3.8
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document.write( ".3x+.4y=10.4\r
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document.write( "Thanks in advance! \n" );
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Algebra.Com's Answer #370654 by mananth(16946)![]() ![]() You can put this solution on YOUR website! 0.20 x -0.50 y = -3.80 .............1 \n" ); document.write( "0.30 x + 0.40 y = 10.40 .............2 \n" ); document.write( "Eliminate y \n" ); document.write( "multiply (1)by 0.4 \n" ); document.write( "Multiply (2) by 0.5 \n" ); document.write( "0.08 x -0.20 y = -1.52 \n" ); document.write( "0.15 x + 0.2 y = 5.20 \n" ); document.write( "Add the two equations \n" ); document.write( "0.23 x = 3.68 \n" ); document.write( "/ 0.23 \n" ); document.write( "x = 16 \n" ); document.write( "plug value of x in (1) \n" ); document.write( "0.2 x -0.5 y = -3.8 \n" ); document.write( "3.2 -0.5 y = -3.8 \n" ); document.write( " -0.5 y = -3.8 -3.2 \n" ); document.write( " -0.5 y = -7 \n" ); document.write( " y = 14 \n" ); document.write( " \n" ); document.write( " |