SOLUTION: How much of a 40% concentrate of insecticide when added to 1 gallon of water will yield a .5% solution?

SOLUTION: How much of a 40% concentrate of insecticide when added to 1 gallon of water will yield a .5% solution?

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Question 457116: How much of a 40% concentrate of insecticide when added to 1 gallon of water will yield a .5% solution?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
.6x+1=.995(x+1)
.6x+1=.995x+.995
.005=.395x
x=.012658 gals.
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