SOLUTION: twelve gallons of regular unleaded gasoline plus 8 gallons of premium unleaded gasoline cost $50.86 . Premium unleaded gasoline costs $0.11 more per gallon than regular unleaded .

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Question 961556: twelve gallons of regular unleaded gasoline plus 8 gallons of premium unleaded gasoline cost $50.86 . Premium unleaded gasoline costs $0.11 more per gallon than regular unleaded . Find the price per gallon for each grade of gasoline .
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
r for REGULAR unleaded, p for premium unleaded, dollars per gallon
system%2812%2Ar%2B8%2Ap=50.86%2Cp=r%2B0.11%29