Question

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?

Answer 1

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