How would you go about solving this problem?

Question

A 2000 L tank containing 550 L of water is being filled with water at the rate of 75 L per minute from a full 1600 L tank. How long will it be before the two tanks have the same amount of water?

Answer 1

550 + x = 1600 -x
2x = 1050
so
525 L moves
time = 525 L / 25 L/min

Answer 2

I think Professor Damon means

time=525/75 min

Answer 3

Thank you!