Question

-x + 6 = 7?

Answer 1

There's a couple of ways to go about this.
Let's try one of them:
Add x to the other side to get: 6 = 7+x
Then subtract 7 from both sides to get x on its own.
Then you have your answer.

Answer 2

-6 from both sides and then divide the negative out on both sides

Answer 3

so after you do all the step it would be x=1

Answer 4

subtract 6 on both sides
-x=1 and then divide by the negative you should get x = -1

Answer 5

plug it back in..negatives cancel