if a bathtub is being filled at a rate of 2.5 gallons per minute, how long will it take to fill the bathtub?

Let x = number of minutes

(2.5 liters/min) * (x) = 30 liters

x = (30 liters) / (2.5 liters/min)

x = 30/2.5 min [note how liters cancel]

x = 12 min

Check:

Is 2.5*12 = 30?

30 = 30? yes

You need say how big the bathtub it is or you cant do it.

type the rest and ill try to answer it