# SOLUTION: A contractor mixes concrete from bags of pre-mix for small jobs. How many bags of 3% cement should he mix with 5 bags of 28.2% cement to produce a mix containing 12% cement. I h

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 Click here to see ALL problems on Mixture Word Problems Question 408053: A contractor mixes concrete from bags of pre-mix for small jobs. How many bags of 3% cement should he mix with 5 bags of 28.2% cement to produce a mix containing 12% cement. I have been trying for two days on this problem. I have gotten different answers everytime. I am using a picture, table and still not getting it. Please help!!Answer by scott8148(6628)   (Show Source): You can put this solution on YOUR website!this is a standard solution format for the majority of mixture problems x(3%) + 5(28.2%) = (x + 5)(12%)