SOLUTION: A 25% chlorine solution was mixed with an 18% solution to create a 20% solution. How much of the 18% and 25% solution were used to make 28L of the 20% solution?

Question 190753: A 25% chlorine solution was mixed with an 18% solution to create a 20% solution. How much of the 18% and 25% solution were used to make 28L of the 20% solution?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A 25% chlorine solution was mixed with an 18% solution to create a 20% solution. How much of the 18% and 25% solution were used to make 28L of the 20% solution?
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Equation:
active ingredient + active ingre = active ingre
0.25x + 0.18(28-x) = 0.20*28
Multiply thru by 100 to get:
25x + 18*28 -18x = 20*28
7x = 2*28
x = 8L (amt. of 25% solution in the mixture)
28-x = 28-8 = 20 L (amt. of 18% solution in the mixture)
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Cheers,
Stan H.
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