Problema Solution
How many gallons of 60% antifreeze solution must be mixed with 90 gallons of 15% antifreeze to get mixture that is 50% antifreeze?
Answer provided by our tutors
let x = gallons of 60% antifreeze solution that we need to add
0.60*x + 0.15*90 = 0.50(x + 90)
by solving the equation we find
x = 315 gal
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315 gallons of 60% antifreeze solution must used for the mix.