Question
Prompt
A landscaping company mixes oil with gasoline to power its tools. A chainsaw requires 8 ounces of oil per gallon of gasoline. A lawnmower requires 4 ounces of oil per gallon of gasoline. The company uses a total of 21 ounces of oil in its mixes for the chainsaw and lawnmower. Which of the following equations represents this situation, where represents the amount of gasoline, in gallons, in the mix for the chainsaw and represents the amount of gasoline, in gallons, in the mix for the lawnmower?