Hi,

Let x represent the total amount of the 50% solution.  

Then (50L - x) would be the amount of 30% solution

Question states***

.50x + .30(50L - x) = .46*50L

solving for x

.20x = .16*50L

x = 40L of the 50% solution and 10L of the 30% solution



checking our answer

20 + 3 = 23 

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