SOLUTION: A solution of 68% fertilizer is to be mixed with a solution of 32% fertilizer to form 108 liters of a 40% solution. How many liters of the 68% solution must be used?

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Question 141629: A solution of 68% fertilizer is to be mixed with a solution of 32% fertilizer to form 108 liters of a 40% solution. How many liters of the 68% solution must be used?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
.68X+.32(108-X)=.40*108
.68X+34.56-.32X=43.2
.36X=43.2-34.56
.36X=8.64
X=8.64/.36
X=24 LITERS OF 68% SOLUTION IS REQUIRED.
PROOF:
.68*24+.32(108-24)=43.2
16.32+.32*84=43.2
16.32+26.88=43.2
43.2=43.2