A partially-filled water tank contains 300 gallons of water. Water is the pumped into the rank at a constant rate. after n minutes, the amount of water, W, in the tabk is W = 300+gngallons. After how many minutes will W = 450gallons?

To start you need to find the difference of how much it has increased which is 150 and then from the question we can gather that the tank fills and about 1 gallon per minute so then we divide the number we got before by the rate so that should 150 minutes in order to get 450 gallons