SOLUTION: A solution contains 30% water and 70% milk. What quantity of water should be added to 6 litres of solution so that the water content became 40% ?

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Question 1008031: A solution contains 30% water and 70% milk. What quantity of water should be added to 6 litres of solution so that the water content became 40% ?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Call x the amount of water you add...then we have
x(1) + 6(.30) = (6+x)(.40)
x + 1.8 = 2.4 + .4x
.6x = .6
x = 1 liter