document.write( "Question 1162615: A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 11% cement should he mix with 10 bags of 12.5% cement to produce a mix containing 12% cement? \n" ); document.write( "
Algebra.Com's Answer #786449 by josgarithmetic(39617)\"\" \"About 
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b number of bags of the 11%
\n" ); document.write( "10 bags of the 12.5%\r
\n" ); document.write( "\n" ); document.write( "Total Number Bags, b+10\r
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\n" ); document.write( "\n" ); document.write( "\"11b%2B12.5%2A10=12%28b%2B10%29\"
\n" ); document.write( "-
\n" ); document.write( "\"11b%2B12.5%2A10=12b%2B120\"
\n" ); document.write( "\"11b%2B125=12b%2B120\"
\n" ); document.write( "\"highlight%285=b%29\"
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