Can someone explain how to work this out please ?

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

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x

Which expression is equal to (f+g)(x)?