document.write( "Question 1116739: Please help me solve this equation: \"+2x++-++%282x%2B11%29%2F5++-++%284x-6%29%2F11++=++-+%287-8x%29%2F7+\"
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\n" ); document.write( "How I tried: 2x - (2x+11)/5= (10x-2x+11)/5
\n" ); document.write( "So, (10x-2x+11)/5 - (4x-6)/11 = (7-8x)/7 equals (10x-2x+11)/5 times 385(385 is the LCM of the denominators) - (4x-6)/11 times 385 = -(7-8x)/7 times 385, which equals 770x-154x+847-140x-210=-385-440x
\n" ); document.write( "Now, Transposition: 770x+440x-154x-140x=-385-847+210 which equals 916x=1442
\n" ); document.write( " x=1 526/916
\n" ); document.write( "This is the wrong answer; the answer from my key book is 7. I hope you can understand my equation; I've worked it several times and can't get the right answer! I don't think I'm understanding how to work this kind of equation. I appreciate any help you can offer, if you can't understand or get the equation it's ok! \r
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Algebra.Com's Answer #731652 by KMST(5328)\"\" \"About 
You can put this solution on YOUR website!
I fail to why \"2x+-+%282x%2B11%29%2F5=+%2810x-2x%2B11%29%2F5\" is part of your post.
\n" ); document.write( "I imagine it is a typo of sorts.
\n" ); document.write( "It has nothing to do with
\n" ); document.write( "\"2x++-++%282x%2B11%29%2F5++-++%284x-6%29%2F11++=++-+%287-8x%29%2F7+\" .
\n" ); document.write( "AS you said, the LCM of the denominators is \"5%2A7%2A11=35%2A11=385\" .
\n" ); document.write( "Multiplying both sides of \"2x-%282x%2B11%29%2F5-%284x-6%29%2F11=-%287-8x%29%2F7\"
\n" ); document.write( "times \"385=7%2A11\" , we get in more, or less, or different steps
\n" ); document.write( "\"385%2A2x-5%2A7%2A11%282x%2B11%29%2F5-5%2A7%2A11%284x-6%29%2F11=-5%2A7%2A11%287-8x%29%2F7\" ,
\n" ); document.write( "\"770x-77%282x%2B11%29-35%284x-6%29%2F11=-55%287-8x%29%2F7\" ,
\n" ); document.write( "\"770x-154x-847-140x%2B210=-385%2B440x\" ,\r
\n" ); document.write( "\n" ); document.write( "\"770x-154x-140x-440x=847-210-385\" ,
\n" ); document.write( "\"576x-637=-385%2B440x\" ,
\n" ); document.write( "\"36x=252\" , and \"x=252%2F36=7\" .
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\n" ); document.write( "There are signs that are wrong in
\n" ); document.write( "\"770x%2B440x-154x-140x=-385-847%2B210\" ,
\n" ); document.write( "but that occasionally happens to the best of us.
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\n" ); document.write( "It should be
\n" ); document.write( "\"770x-440x-154x-140x=-385%2B847-210\" .
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\n" ); document.write( "When you see that you get a very ugly fraction,
\n" ); document.write( "you have to suspect you made a mistake.
\n" ); document.write( "The problem, as I found out in an exam over 50 tears ago,
\n" ); document.write( "is to find where you made a mistake.
\n" ); document.write( "A sign can mutate as you copy the equation from the bottom of page 1
\n" ); document.write( "to the top of page 2, as I remember well.
\n" ); document.write( "The solution (in math class, not in life) should be as simple as \"x=7\" ,
\n" ); document.write( "which makes \"2x=14\" , \"4x=28\" , and \"8x=56\" .
\n" ); document.write( "You can substitute to get
\n" ); document.write( "\"2x=14\" ,
\n" ); document.write( "\"%282x%2B11%29%2F5=%2814%2B11%29%2F5=35%2F5=7\" ,
\n" ); document.write( "\"%284x-6%29%2F11=%2828-6%29%2F11=22%2F11=2\" ,
\n" ); document.write( "\"%287-8x%29%2F7=%287-56%29%2F7=%28-49%29%2F7=7\" ,
\n" ); document.write( "and that makes verifying the solution very simple and easy.
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