document.write( "Question 178366: 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 14% cement to produce a mix containing 10% cement? \n" ); document.write( "
Algebra.Com's Answer #133328 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! 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 14% cement to produce a mix containing 10% cement? \n" ); document.write( ". \n" ); document.write( "Let x = bags of 6% cement \n" ); document.write( "then \n" ); document.write( "\"cement from 6%\" + \"cement from 14%\" = \"total amount of cement\" \n" ); document.write( ".06x + .14(5) = .10(x+5) \n" ); document.write( ".06x + .7 = .10x + .5 \n" ); document.write( ".7 = .04x + .5 \n" ); document.write( ".2 = .04x \n" ); document.write( "5 bags = x \r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |