SOLUTION: There are 2 vats of milk, one containing 25% protein and the other 40% protein. These two are to be mixed in order to get 12 liters of a 35% protein content milk. How many liters o

Question 1005253: There are 2 vats of milk, one containing 25% protein and the other 40% protein. These two are to be mixed in order to get 12 liters of a 35% protein content milk. How many liters of each must be used?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = liters of 25% protein needed
Let = liters of 40% protein needed
----------------------------------
(1)
(2)
--------------------------
(2)
(2)
(2)
----------------------
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
-----------------------

and
(1)
(1)
---------------
4 liters of 25% protein are needed
8 liters of 40% protein are needed
-----------------------------
check:
(2)
(2)
You can finish
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