SOLUTION: If three gallons of grade A oil are mixed with seven gal of grade B oil the resulting mixture is worth 43 cents per gal. However, if three gal of grade A oil are mixed with two gal

Algebra ->  Test -> SOLUTION: If three gallons of grade A oil are mixed with seven gal of grade B oil the resulting mixture is worth 43 cents per gal. However, if three gal of grade A oil are mixed with two gal      Log On


   

Question 402591: If three gallons of grade A oil are mixed with seven gal of grade B oil the resulting mixture is worth 43 cents per gal. However, if three gal of grade A oil are mixed with two gal of grade B oil the resulting mixture is worth 46 cents per gal. Find the price per gallon of each grade.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
3A + 7B = 10(.43)

3A + 2B = 5(.46)

subtracting equations (eliminating A) ___ 5B = 2.00 ___ B = .40

substitute to find A