SOLUTION: A 10% solution is mixed with 1L of water to get 5L of a 4% solution. how much of the 10% solution was available at the start?

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Question 709791: A 10% solution is mixed with 1L of water to get 5L of a 4% solution. how much of the 10% solution was available at the start?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A 10% solution is mixed with 1L of water to get 5L of a 4% solution. how much of the 10% solution was available at the start?
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Equation:
water + water = water
0.90x + 1*1 = 0.96(5)
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90x + 100 = 96*5
90x = 380
x = 3.22 liters (amt. of 10% solution at the start)
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Cheers,
Stan H.
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