Question

Jayne stopped to get gas before going on a road trip. The tank already had 4 gallons of gas in it. Which equation relates the total amount of gasoline in the tank, y, to the number of gallons that she put in

Answer 1

y = 4 + x, is that what you mean?

If you let x be the amount of gasoline Jayne added from the gas station, this is what the equation would look like...