Problema Solution
how many gallon of a 3% salt solution must be mixed with 50 gallons of 7% salt solution to obtain a 5% solution
Answer provided by our tutors
let
x = gal of 3% salt solution needed for the mix
0.03x + 0.07*50 = 0.05(x + 50)
by solving we find
x = 50 gal
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50 gallons of 3% solution must be used for the mix.