document.write( "Question 806668: Find the nonpermissible replacement for the variable in this expression.\r
\n" ); document.write( "\n" ); document.write( " 5x
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\n" ); document.write( "6x+3
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Algebra.Com's Answer #485987 by jim_thompson5910(35256)\"\" \"About 
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You CANNOT divide by zero. So 6x+3 cannot be zero. If it were, then...\r
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\n" ); document.write( "\n" ); document.write( "6x+3 = 0\r
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\n" ); document.write( "\n" ); document.write( "6x = -3\r
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\n" ); document.write( "\n" ); document.write( "x = -3/6\r
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\n" ); document.write( "\n" ); document.write( "x = -1/2\r
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\n" ); document.write( "\n" ); document.write( "So if x = -1/2, then the denominator 6x+3 is 0. This is why x = -1/2 is the value that's not allowed (to avoid division by zero)
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