document.write( "Question 1209143: y=4x 8x−4y=-40\r
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Algebra.Com's Answer #847735 by ikleyn(52814) $\"\"$ $\"About$

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document.write( "From the first equation, substitute y = 4x into the second equation.\r\n" );
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document.write( "You will get\r\n" );
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document.write( "    8x - 4(4x) = -40,\r\n" );
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document.write( "    8x - 16x = -40\r\n" );
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document.write( "      -8x    = -40\r\n" );
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document.write( "        x    =  =  = 5.\r\n" );
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document.write( "Then from the first equation  y = 4x = 4*5 = 20.\r\n" );
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document.write( "ANSWER.  x= 5,  y= 20.\r\n" );
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