Answer:
[tex]17 \: \: degrees[/tex]
Step-by-step explanation:
[tex]7x + 2x + 27 = 180 \\ 9x = 180 - 27 \\ 9x = 153 \\ \frac{9x}{9} = \frac{153}{9} \\ x = 17 \: \: degrees[/tex]