### Instruction: Solve for $x$: $5 - x = 8$.### Response: To solve for $x$, I need to isolate it on one side of the equation.
I can do this by adding $x$ to both sides, which will cancel out the $x$ on the left.
This gives me $5 = 8 + x$.
Now I need to move the 8 to the other side, so I subtract 8 from both sides.
This gives me $5 - 8 = x$.
Simplifying, I get $-3 = x$.