Question 227475: How many liters of 20% solution and how many liters of 70% solution must be combineed to produce five liters of 40% solution? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = liters of 20% solution needed
Let = liters of 70% solution needed
(1)
(2)
Multiply both sides of (2) by
and subtract from (1)
(1)
(2)
and, since
2 liters of 20% solution and 3 liters of 70%
solution are needed
