SOLUTION: How many mililiters of a 30 percent solution must be mixed with 12 mililiters of a 5 percent solution to obtain a 20 percent solution

Question 1145782: How many mililiters of a 30 percent solution must be mixed with 12 mililiters of a 5 percent solution to obtain a 20 percent solution
Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
How many mililiters of a 30 percent solution must be mixed with 12 mililiters of a 5 percent solution to obtain a 20 percent solution
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Add M mls of 30%
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M*30 + 12*5 = (M + 12)*20
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
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How many mililiters x of a H percent solution must be mixed with Y mililiters of a L percent solution to obtain a T percent solution ?
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Unknown volume to use, x of the H% solution

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--------substitute your given values.
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