SOLUTION: A service station has 36 octane and 84 octane gasoline. How many liters of each gasoline should be mixed to provide 12 liters of 68 octane gasoline for a chemistry​ experimen

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Question 1122618: A service station has 36 octane and 84 octane gasoline. How many liters of each gasoline should be mixed to provide 12 liters of 68 octane gasoline for a chemistry​ experiment?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
system%2836u%2B84v=68%2A12%2Cu%2Bv=12%29
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6u%2B14v=68%2A2
3u%2B7v=68
3%2812-v%29%2B7v=68------one equation in one variable
36-3v%2B7v=68
4v=68-36
highlight%28v=8%29-----------liters of the 84 Octane gasoline.
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