Answer:
Final answer is choice a). [tex]-17-9n[/tex]
Step-by-step explanation:
Given expression is
[tex]-7\left(2+n\right)+\frac{1}{3}\left(-9-6n\right)[/tex]
[tex]=-14-7n+\frac{1}{3}\left(-9-6n\right)[/tex]
[tex]=-14-7n-3-2n[/tex]
[tex]=[/tex]
[tex]=-14-3-7n-2n[/tex]
[tex]=-17-9n[/tex]
Hence final answer is choice a). [tex]-17-9n[/tex]
