The schwartz family spent a total of $111.75 for internet service for 3 months. each month they received $5.50 as a credit on the bill. which equation and solution shows the cost of their monthly internet service before the credit?

The cost of their monthly Internet service before the credit is $31.75

The required equation =  

Step-by-step explanation:

Let the monthly cost be x

Each month they received $5.50 as a credit on the bill.

The Schwartz family spent a total of $111.75 for Internet service for 3 months.

So, total cost of three moths =

Since we are given that The Schwartz family spent a total of $111.75

So,  

Hence the cost of their monthly Internet service before the credit is $31.75

The required equation =