Question 1123850: How many liters each of a
25%
acid solution and a
85%
acid solution must be used to produce
80
liters of a
40%
acid solution? Found 2 solutions by josgarithmetic, rothauserc:Answer by josgarithmetic(39616) (Show Source):
You can put this solution on YOUR website! let x stand for the number of liters of the 25% solution
:
let y stand for the number of liters of the 85% solution
:
x + y = 80, therefore
:
x = (80-y)
:
0.40 * 80 = 32 liters of acid
:
0.25(80-y) + 0.85y = 32
:
20 - 0.25y + 0.85y = 32
:
0.60y = 12
:
y = 20
:
x = 80 - 20 = 60
:
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We need 60 liters of the 25% solution and 20 liters of the 85% solution
:
Note (0.25 * 60) + (0.85 * 20) = 32 liters
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