Answer:
x=12
Step-by-step explanation:
(9x-4)+(5x+16)=180
14x+12=180
-12 -12
14x=168
then devide both sides by 14
Answer: x= 12 degrees
1) (5x+16)+(9x-4)=180 degrees
Reasoning: Same side interior angles
2) 14x+12=180 degrees
Reasoning: Algebra
3) 14x=168
x= 12 degrees
