Mai's fish tank has 15 liters of water in it. She plans to add 5 liters per minute until the tank has more than 60 liters. What are the possible numbers of minutes Mai could add water?

Question

use t for the number of minutes

Answer 1

T = 15 + 5t

60 =15 +5t

5t = 60-15 = 45

t = 45/5 = 9 minutes to get 60 liters

for more than 60 liters, you need more than 9 minutes