Lena's fish tank has 19 liters of water in it. she plans to add 4 liters per minute until the tank has at least 43 liters. what are the possible numbers of minutes lena could add water?

We are going to define a variable to solve the problem.

x: amount of time in munites

The inequality in this case is given by:

4x + 19> 43

Clearing x we have:

4x> 43-19

4x> 24

x> 24/4

x> 6

Answer:

the possible numbers of minutes lena could add water is:

x> 6 minutes