SOLUTION: A 30% salt solution is prepared by mixing a 20% salt solution and a 45% salt solution.how many litrs of each must be used to produce 60L of the 30% salt solution

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Question 405442: A 30% salt solution is prepared by mixing a 20% salt solution and a 45% salt solution.how many litrs of each must be used to produce 60L of the 30% salt solution
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
0.20x + 0.45(60 - x) = 0.30*60
==> 0.20x + 27 - 0.45x = 18
==> -0.25x = -9
==> x = 35 L, the amount of the 20% solution, and
60 - x = 25L, the amount of the 45% solution.