Our teachers gave us a packet with the first two chapters of our book b/c they are too lazy to actually teach it. It contained no instructions, only the pages with the actual problems. I figured out multi-step... but how do you do equations with variables on both sides, such as:

7 - 2n = n - 14

(4- 2r) = -2(r+5)

It would be appreciated if you could explain all types.