1-bx-x+b=

To simplify the expression \(1 - bx - x + b\), we can rearrange the terms. Let's group the constants and the terms with \(x\):

\[ 1 + b - bx - x \]

Now we can factor out \(x\) from the terms that contain it:

\[ 1 + b - (b + 1)x \]

Thus, the expression \(1 - bx - x + b\) simplifies to:

\[ (1 + b) - (b + 1)x \]

This is the simplified form of the expression.