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OpenStudy (anonymous):
PLEASE HELP: How many gallons of a 30% acid solution must be mixed with 50 gallons of a 70% acid solution to make 55% acid solution? Explain.
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OpenStudy (anonymous):
Let x be gallons of 30% acid solution. Total gallons=x+50 0.3x+0.7(50)=(x+50)(0.55) Solve for x.
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