document.write( "Question 1130150: a contractor mixes concrete from bags of pre-mix for small jobs how many bags with 6% cement should he mix with 5 bags of 18.8% cement to produce a mix containing 10% cement? \n" ); document.write( "
Algebra.Com's Answer #746810 by josgarithmetic(39617)\"\" \"About 
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x bags of 6% cement
\n" ); document.write( "5 bags of 18.8% cement
\n" ); document.write( "want 10% cement\r
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\n" ); document.write( "\n" ); document.write( "\"6x%2B%2818.8%29%285%29=10%28x%2B5%29\"\r
\n" ); document.write( "\n" ); document.write( "\"%2818.8%29%285%29-50=4x\"\r
\n" ); document.write( "\n" ); document.write( "\"x=%2818.8%2A5-50%29%2F4\"\r
\n" ); document.write( "\n" ); document.write( "\"x=11\"\r
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\n" ); document.write( "USING THE PERCENTS AS DECIMAL FRACTIONS AND SETUP WITH RATIONAL EXPRESSION\r
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\n" ); document.write( "\n" ); document.write( "\"cement%2Fconcretemixture=fractionwanted\"\r
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\n" ); document.write( "\n" ); document.write( "\"%280.06x%2B0.188%2A5%29%2F%28x%2B5%29=0.10\"\r
\n" ); document.write( "\n" ); document.write( "The algebra should be straightforward from here.
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