SOLUTION: A 20% concentrate is to be mixed with a mixture having a concentration of 60% to obtain 80 liters of a mixture with a concentration of 30%.��How much of the 20% concentrate and the

Question 909062: A 20% concentrate is to be mixed with a mixture having a concentration of 60% to obtain 80 liters of a mixture with a concentration of 30%.��How much of the 20% concentrate and the 60% concentrate will be needed?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = liters of 20% mixture needed
= liters of the concentrate in 20% mixture
Let = liters of 60% mixture needed
= liters of the concentrate in 60% mixture
---------------------------------------------
(1)
(2)
----------------------------
(2)
(2)
(2)
Subtract (1) from (2)
(2)
(1)

and
(1)
(1)
(1)
----------------
60 liters of 20% mixture is needed
20 liters of 60% mixture is needed
---------------
check:
(2)
(2)
(2)
(2)
(2)
OK

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