Suppose that four 85-octane gasoline pumps and three 89-octane gasoline pumps provide as much profit at a

Question:

Suppose that four 85-octane gasoline pumps and three 89-octane gasoline pumps provide as much profit at a local convenience store in five days as three 85-octane pumps and five 89-octane pumps provide in four days. Which gasoline pump produces greater profit for the store?