document.write( "Question 324151: 8x-4y=12 2x-8y=3 \n" ); document.write( "
Algebra.Com's Answer #231997 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "Start with the given system of equations:\r
\n" ); document.write( "\n" ); document.write( "\"system%288x-4y=12%2C2x-8y=3%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"-2%288x-4y%29=-2%2812%29\" Multiply the both sides of the first equation by -2.\r
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\n" ); document.write( "\n" ); document.write( "\"-16x%2B8y=-24\" Distribute and multiply.\r
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\n" ); document.write( "\n" ); document.write( "So we have the new system of equations:\r
\n" ); document.write( "\n" ); document.write( "\"system%28-16x%2B8y=-24%2C2x-8y=3%29\"\r
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\n" ); document.write( "\n" ); document.write( "Now add the equations together. You can do this by simply adding the two left sides and the two right sides separately like this:\r
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\n" ); document.write( "\n" ); document.write( "\"%28-16x%2B8y%29%2B%282x-8y%29=%28-24%29%2B%283%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28-16x%2B2x%29%2B%288y%2B-8y%29=-24%2B3\" Group like terms.\r
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\n" ); document.write( "\n" ); document.write( "\"-14x%2B0y=-21\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "\"-14x=-21\" Simplify.\r
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\n" ); document.write( "\n" ); document.write( "\"x=%28-21%29%2F%28-14%29\" Divide both sides by \"-14\" to isolate \"x\".\r
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\n" ); document.write( "\n" ); document.write( "\"x=3%2F2\" Reduce.\r
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\n" ); document.write( "\n" ); document.write( "\"-16x%2B8y=-24\" Now go back to the first equation.\r
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\n" ); document.write( "\n" ); document.write( "\"-16%283%2F2%29%2B8y=-24\" Plug in \"x=3%2F2\".\r
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\n" ); document.write( "\n" ); document.write( "\"-24%2B8y=-24\" Multiply.\r
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\n" ); document.write( "\n" ); document.write( "\"8y=-24%2B24\" Add \"24\" to both sides.\r
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\n" ); document.write( "\n" ); document.write( "\"8y=0\" Combine like terms on the right side.\r
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\n" ); document.write( "\n" ); document.write( "\"y=%280%29%2F%288%29\" Divide both sides by \"8\" to isolate \"y\".\r
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\n" ); document.write( "\n" ); document.write( "\"y=0\" Reduce.\r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"x=3%2F2\" and \"y=0\".\r
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\n" ); document.write( "\n" ); document.write( "Which form the ordered pair .\r
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\n" ); document.write( "\n" ); document.write( "This means that the system is consistent and independent.
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