Which operation goes where?

Question

Given:   

Rewrite the equation to solve for C, or rather, get C on the left hand side of the equation.  When you rearrange this equation to yield a formula for finding C, you will have the following equation: 

C = A ___ B ___ D           

What operations go in the blanks?

Answer 1

D = A - B - C

You want C by itself, and without a negative sign in front if it. Add C to both sides and get

C + D = A - B

Subtract D from both sides and get

C = A - B - D