Problema Solution
A chemist must mix 12 liters of a 35% acid solution with some 80% solution to get a 60% solution. How much of the 80% solution should be used?
Answer provided by our tutors
let
x = liters of the 80% solution, x>0
0.35*12 + 0.80*x = 0.60(12 + x)
by solving we find
x = 15 l
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15 liters of the 80% solution should be used.