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OpenStudy (anonymous):
220 gallons of 19% fertalizer is needed. i have 25% and 15% how many gallons of each is needed
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OpenStudy (mertsj):
x=gallons of 25% solution 220-x= gallons of 15% solution .25x+.15(220-x)=.19(220)
OpenStudy (mertsj):
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