document.write( "Question 147780: the soloution of the system of equations below\r
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Algebra.Com's Answer #108159 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
Start with the given system of equations:\r
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\n" ); document.write( "\n" ); document.write( "\"system%28y=5-3x%2C4x-5y=13%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=5-3x\" Start with the first equation.\r
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\n" ); document.write( "\n" ); document.write( "\"y=-3x%2B5\" Rearrange the terms.\r
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\n" ); document.write( "\n" ); document.write( "\"4x-5%28-3x%2B5%29=13\" Now plug in \"y=-3x%2B5\" into the second equation.\r
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\n" ); document.write( "\n" ); document.write( "\"4x%2B15x-25=13\" Distribute.\r
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\n" ); document.write( "\n" ); document.write( "\"19x-25=13\" Combine like terms on the left side.\r
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\n" ); document.write( "\n" ); document.write( "\"19x=13%2B25\" Add \"25\" to both sides.\r
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\n" ); document.write( "\n" ); document.write( "\"19x=38\" Combine like terms on the right side.\r
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\n" ); document.write( "\n" ); document.write( "\"x=%2838%29%2F%2819%29\" Divide both sides by \"19\" to isolate \"x\".\r
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\n" ); document.write( "\n" ); document.write( "\"x=2\" Reduce.\r
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\n" ); document.write( "\n" ); document.write( "Since we know that \"x=2\", we can use this to find \"y\".\r
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\n" ); document.write( "\n" ); document.write( "\"y=5-3x\" Go back to the first equation.\r
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\n" ); document.write( "\n" ); document.write( "\"y=5-3%282%29\" Plug in \"x=2\".\r
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\n" ); document.write( "\n" ); document.write( "\"y=-1\" Simplify.\r
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\n" ); document.write( "\n" ); document.write( "So the answer is \"x=2\" and \"y=-1\".\r
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\n" ); document.write( "\n" ); document.write( "This means that the system is consistent and independent.\r
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\n" ); document.write( "\n" ); document.write( "Notice when we graph the equations, we see that they intersect at . So this visually verifies our answer.\r
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\n" ); document.write( "\n" ); document.write( " Graph of \"y=5-3x\" (red) and \"4x-5y=13\" (green) \r
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