Problema Solution
How many gallons of gasoline that is 12% ethanol must be added to 2,000 gallons of gasoline with no ethanol to get a mixture that is 10% ethanol.
Answer provided by our tutors
let
x = gallons of the 12% ethanol
0.12*x + 0*2000 = 0.10(x + 2000)
by solving the equation we find
x = 10,000 gallons
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