SOLUTION: How many gallons of gasoline that is 12 % ethanol must be added to 2000 gallons of gasoline that has no ethanol to obtain a mixture that is 10 % ethanol?

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Question 156388: How many gallons of gasoline that is 12 % ethanol must be added to 2000 gallons of gasoline that has no ethanol to obtain a mixture that is 10 % ethanol?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many gallons of gasoline that is 12 % ethanol must be added to 2000 gallons of gasoline that has no ethanol to obtain a mixture that is 10 % ethanol?
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Ethanol Equation: 0.12x + 0*2000 = 0.10(x+2000)
0.12x = 0.10x + 200
0.02x = 200
x = 10,000 gallons (amt. of 12% ethanol that must be added)
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Cheers,
Stan H.