SOLUTION: How much developer must be added to 9 pints of 15% developer to produce a mixture that is 50% developer?
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Question 343678: How much developer must be added to 9 pints of 15% developer to produce a mixture that is 50% developer?
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
(9)(15%) + (x)(100%) = (9 + x)(50%)
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