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how many liters of a 20% alcohol solution should be mixed with a 50 liters of a 60% alcohol solution to obtain a 30% solution?

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deathstrike001

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crisforp

(0.20x+500.60)(x+50) = 0.30 <=>0.20x + 30 = 0.30x + 15 <=> 30 - 15 = 0.30x - 0.20x <=> 15 = 0.10x <=> x = 15(100/10) <=> x = 150;

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