SOLUTION: How many liters of 7% acid must be mixed with how many liters of 12% acid solution by a chemist to obtian 6 liters of 10% acid?

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Question 541069: How many liters of 7% acid must be mixed with how many liters of 12% acid solution by a chemist to obtian 6 liters of 10% acid?
Found 2 solutions by scott8148, Alan3354:
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(7%)(x) + (12%)(6 - x) = (10%)(6)

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How many liters of 7% acid must be mixed with how many liters of 12% acid solution by a chemist to obtian 6 liters of 10% acid?
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s = amount of 7%
t = amount of 12%
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s + t = 6 (total solution)
0.07s + 0.12t = 6*0.1 (total acid)
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Solve for s & t