SOLUTION: How many liters of water containing 3 grams of salt per liter must be combined with 4 liters of water which contains y grams (y is less than 2) of salt per liter to yield a solutio

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Question 258678: How many liters of water containing 3 grams of salt per liter must be combined with 4 liters of water which contains y grams (y is less than 2) of salt per liter to yield a solution with 2 grams of salt per liter.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let L be the number of liters of 3 g/L solution to be added.
3L%2By%284%29=2%28L%2B4%29
3L%2B4y=2L%2B8
L=8-4y