Need answer to this linear algebra question.
Selected answer is not necessarily correct.

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

To determine the number of deer in a forest a forest ranger tags 280 and releases them back