The expression to simplify is:
[tex]12x-13-x-9+10x[/tex]To simplify, we collect the like terms.
We add/subtract x's and numbers separately.
Let's do this:
[tex]\begin{gathered} 12x-13-x-9+10x \\ =12x-x+10x-13-9 \\ =21x-22 \end{gathered}[/tex]From the answer choice,
Correct Answer is B
