Can you tell me the procedure of these

x-7 = -2

x-1 = 7

9-x = -10
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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?

Describe the relationship between the angles of similar triangles and the sides of similar triangles

Find the multiplicative inverse of 8-12i