Pls help doing this i don´t get it

Is -24 a solution to the equation -16+2x=-64

Marcus built a model car that is 4 inches wide. what scale was used to build the car if the actual width of the car is 6 feet? a. 1 in. = 2 ftb. 1 in. = 2.5 ftc. 1 in. = 1.5 ftd. 1 ft = 1.5 in.

He concluded that a heavier object dropped from the same height as a lighter object will land