<PRE><B>Question 245152</B>
In a chemistry class, 5 liters of a 4%-saline solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
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Equation:
saline + saline = saline
0.04*5 + 0.10x = 0.06(5+x)
Multiply thru by 100 to get:
4*5 + 10x = 6*5+6x
4x = 2*5
x = 2.5 liters (amt. of 10% solution needed in the mix)
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Cheers,
Stan H.

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