document.write( "Question 134232: 1/3x - 1/6y =1/3
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Algebra.Com's Answer #98169 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
Do you want to use substitution to solve this system?\r
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\n" ); document.write( "\n" ); document.write( "Let's look at the first equation \"%281%2F3%29x-%281%2F6%29y=1%2F3\"\r
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\n" ); document.write( "\n" ); document.write( "\"6%28%281%2F3%29x-%281%2F6%29y%29=6%281%2F3%29\" Multiply both sides of the first equation by the LCD 6\r
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\n" ); document.write( "\n" ); document.write( "\"2x-y=2\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "Let's look at the second equation \"%281%2F6%29x%2B%281%2F4%29y=0\"\r
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\n" ); document.write( "\n" ); document.write( "\"12%28%281%2F6%29x%2B%281%2F4%29y%29=12%280%29\" Multiply both sides of the second equation by the LCD 12\r
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\n" ); document.write( "\n" ); document.write( "\"2x%2B3y=0\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "So our new system of equations is:\r
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\n" ); document.write( "\n" ); document.write( "\"system%282x-y=2%2C2x%2B3y=0%29\"\r
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\n" ); document.write( "\n" ); document.write( "Now in order to solve this system by using substitution, we need to solve (or isolate) one variable. I'm going to solve for y.\r
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\n" ); document.write( "\n" ); document.write( "So let's isolate y in the first equation\r
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\n" ); document.write( "\n" ); document.write( "\"2x-y=2\" Start with the first equation\r
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\n" ); document.write( "\n" ); document.write( "\"-y=2-2x\" Subtract \"2x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"-y=-2x%2B2\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-2x%2B2%29%2F%28-1%29\" Divide both sides by \"-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28%28-2%29%2F%28-1%29%29x%2B%282%29%2F%28-1%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=2x-2\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Since \"y=2x-2\", we can now replace each \"y\" in the second equation with \"2x-2\" to solve for \"x\"\r
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\n" ); document.write( "\n" ); document.write( "\"2x%2B3highlight%28%282x-2%29%29=0\" Plug in \"y=2x-2\" into the first equation. In other words, replace each \"y\" with \"2x-2\". Notice we've eliminated the \"y\" variables. So we now have a simple equation with one unknown.\r
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\n" ); document.write( "\n" ); document.write( "\"2x%2B%283%29%282%29x%2B%283%29%28-2%29=0\" Distribute \"3\" to \"2x-2\"\r
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\n" ); document.write( "\n" ); document.write( "\"2x%2B6x-6=0\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "\"8x-6=0\" Combine like terms on the left side\r
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\n" ); document.write( "\n" ); document.write( "\"8x=0%2B6\"Add 6 to both sides\r
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\n" ); document.write( "\n" ); document.write( "\"8x=6\" Combine like terms on the right side\r
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\n" ); document.write( "\n" ); document.write( "\"x=%286%29%2F%288%29\" Divide both sides by 8 to isolate x\r
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\n" ); document.write( "\n" ); document.write( "\"x=3%2F4\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "-----------------First Answer------------------------------\r
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\n" ); document.write( "\n" ); document.write( "So the first part of our answer is: \"x=3%2F4\"\r
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\n" ); document.write( "\n" ); document.write( "Since we know that \"x=3%2F4\" we can plug it into the equation \"y=2x-2\" (remember we previously solved for \"y\" in the first equation).\r
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\n" ); document.write( "\n" ); document.write( "\"y=2x-2\" Start with the equation where \"y\" was previously isolated.\r
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\n" ); document.write( "\n" ); document.write( "\"y=2%283%2F4%29-2\" Plug in \"x=3%2F4\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=6%2F4-2\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "\"y=-1%2F2\" Combine like terms and reduce. (note: if you need help with fractions, check out this solver)\r
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\n" ); document.write( "\n" ); document.write( "-----------------Second Answer------------------------------\r
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\n" ); document.write( "\n" ); document.write( "So the second part of our answer is: \"y=-1%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "-----------------Summary------------------------------\r
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\n" ); document.write( "\n" ); document.write( "So our answers are:\r
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\n" ); document.write( "\n" ); document.write( "\"x=3%2F4\" and \"y=-1%2F2\"\r
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