Problema Solution
6. How many gallons of 5% acid solution must be mixed with 5 gal of a 10% solution to obtain a 7% solution
Answer provided by our tutors
let
x= the gallons of 5% acid solution needed for the mix
0.05x + 0.10*5 = 0.07(x + 5)
by solving we find
x = 7.5 gal
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7.5 gal of 5% acid solution are needed for the mix.