document.write( "Question 688435: please help me solve this problem x/7-x/3=4 \n" ); document.write( "
Algebra.Com's Answer #425600 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "\"x%2F7-x%2F3=4\" both sides multiply by LCD of \"7\" and \"3\" which is \"21\" to get a rid of fractions\r
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\n" ); document.write( "\n" ); document.write( "\"x%2A21%2F7-x%2A21%2F3=4%2A21\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%2Across%2821%293%2Fcross%287%29-x%2Across%2821%297%2Fcross%283%29=84\"\r
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\n" ); document.write( "\n" ); document.write( "\"3x-7x=84\"\r
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\n" ); document.write( "\n" ); document.write( "\"-4x=84\"\r
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\n" ); document.write( "\n" ); document.write( "\"x=84%2F-4\"\r
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\n" ); document.write( "\n" ); document.write( "\"x=-21\"\r
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