SOLUTION: a chemist has two solutions. one solution is 20% salt and the other is 45% salt. How many liters of each must be used to produce 100 liters of a solution that is 30% salt? Pl

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Question 321525: a chemist has two solutions. one solution is 20% salt and the other is 45% salt. How many liters of each must be used to produce 100 liters of a solution that is 30% salt?
Please help...Thanks!!!!
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(20%)(x) + (45%)(100 - x) = (30%)(100)

20x + 4500 - 45x = 3000

1500 = 25x ___ 60 = x

60 L of 20% and 40 L of 45%