Reneta and her family go through an average of more than 15 cans of sparkling water each day. They buy cases of 24 cans at $3.50 a case.
The equation is given here.
x ≥ 18.75 (how many cases they go through in 30 days)

If Reneta’s family only buys full cases, how much do they spend on sparkling water in 30 days?