Answer:
x = 18
Explanation:
Our job is to find the correct value for the variable x.
Add 11 to both sides. This gives us 0 = 7 + 11 - x, or 0 = 18 - x.
Now add x to both sides. We get: x = 18. This is the answer.
We should check this result. Start with -11 = 7 - 18. Decide whether this is now true or not. Does -11 on the left side equatl 7-18 on the right? YES.
So, again, the solution is x = 18.