SOLUTION: from 2 stock solutions 18% and 42% you are to prepare 1.5 liters of a 34% solution. How many milligrams of each stock do you need?

Question 556911: from 2 stock solutions 18% and 42% you are to prepare 1.5 liters of a 34% solution. How many milligrams of each stock do you need?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
from 2 stock solutions 18% and 42% you are to prepare 1.5 liters of a 34% solution. How many milligrams of each stock do you need?
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Equation:
active + active = active
0.18x + 0.42(1.5-x) = 0.34*1.5
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Multiply thru by 100 to get:
18x + 42*1.5-42x = 34*1.5
-24x = -18
x = 3/4 liters (amt of 18% solution needed)
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1.5-x = 3/4 liters (amt of 42% solution needed)
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Cheers,
Stan H.
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