Question
Alcohol Mixture How many gallons of pure alcohol should be mixed with 20 gal of a $15 \%$ alcohol solution to obtain a mixture that is $25 \%$ alcohol?
Step 1
We know that the amount of alcohol in the original solution plus the amount of alcohol we add must equal the amount of alcohol in the final solution. This gives us the equation: \[20 \times 0.15 + x \times 1 = (20 + x) \times 0.25\] Show more…
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$$ \text { How many gallons of pure alcohol should be mixed with } 20 \text { gal of } $$ $$ \text { a } 15 \% \text { alcohol solution to obtain a mixture that is } 25 \% \text { alcohol? } $$
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How many gallons of pure alcohol should be mixed with 20 gal of a 15% alcohol solution to obtain a mixture that is 25% alcohol?
Solve each problem. Alcohol Mixture How many gallons of pure alcohol should be mixed with 20 gal of a $15 \%$ alcohol solution to obtain a mixture that is $25 \%$ alcohol?
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