Question 1037865
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it takes 2 parts water and 3 parts detergent to make a solution. How much detergent will it take to make 15 gallons of solution 
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2 parts + 3 parts = 5 parts of equal volumes of liquids.


15 gallons of the solution is 3 times 5 gallons.


Hence, it contains 3*3 = 9 gallons of the detergent.


<U>Answer</U>.  9 gallons of the detergent.