When would u need an interpreter? what would that person do?

Ablock of wood is a cube whose side is x in. long. you cut off a 1-inch thick piece from the entire right side. then you cut off a 3-inch thick piece from the entire top of the remaining shape. the volume of the remaining block is 2,002 in3. what are the dimensions of the original block of wood?

Which of the following expressions are equivalent ?

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