# SOLUTION: The Good Seed Flower Shop sells its own brand of fertilizer. It mixes one brand of fertilizer that contains 7% nitrogen with another than contains 8% nitrogen. The resulting mixtur

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: The Good Seed Flower Shop sells its own brand of fertilizer. It mixes one brand of fertilizer that contains 7% nitrogen with another than contains 8% nitrogen. The resulting mixtur      Log On

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 Click here to see ALL problems on Mixture Word Problems Question 146391: The Good Seed Flower Shop sells its own brand of fertilizer. It mixes one brand of fertilizer that contains 7% nitrogen with another than contains 8% nitrogen. The resulting mixture contains 7.7% nitrogen. How many pounds of the 7% fertilizer must be used to make 400 pounds of the 7.7% mixture?Answer by checkley77(12569)   (Show Source): You can put this solution on YOUR website!.07x+.08(400-x)=.077*400 .07x+32-.08x=30.8 -.01x=30.8-32 -.01x=-1.2 x=-1.2/-.01 x=120 pds. of 7% nitrogen is used. 400-120=380 pds. of 8% is used. proof: .07*120+.08*280=30.8 8.4+22.4=30.8 30.8=30.8