A chemist needs 1000 liters of 30% acid solution. He has a 10% solution and a 60% solution available. How much of each should he mix to obtain his 30% solution?

Answer 1

(x liters)(10%) + (1000 - x liters)(60%) = (1000 liters)(30%)

10x + 60,000 - 60x = 30,000

-50 = -30,000

x = 600 liters of 10% and 400 liters of 60%