SOLUTION: How many pints of 1% hydrogen peroxide peroxide solution should be mixed with 4% hydrogen peroxide solution to obtain 10 pints of a 2% hydrogen peroxide solution

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Question 997368: How many pints of 1% hydrogen peroxide peroxide solution should be mixed with 4% hydrogen peroxide solution to obtain 10 pints of a 2% hydrogen peroxide solution
Answer by addingup(3677) About Me  (Show Source):
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The quantity you want is 10 pints. Let's call the unknown quantity of .01 x. Then, the quantity of .04 will be 10-x.
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.01x+.04(10-x)= .02(10)
.01x+.4-.04x= .2
-.03x= -.2
x= -.2/-.03 Negative divided by negative = positive:
x= 6.67 pints of .01(1%) solution mixed with
10-6.67= 3.33 pints of .04 solution