Show ALL work or explain in details the correct solution: What is the solution to –5 + z = –12?

Question

I know the answer is z = –7. I need help with the "Show ALL work or explain in details the correct solution" part.

Answer 1

your goal is to get z all alone. So,
-5 + z = -12
add 5 to each side
z = -7
Done

Answer 2

Thanks!!