Answer:12
Step-by-step explanation:
6x+48+60=180
since supplementary angles equal 180 degrees you would set up the equation like above
Then you would add 48 and 60 which will give you 108.
6x+108=180
Then subtract 108 from both sides adn you get
6x=72
divide both sides by 6 and your final answer is
x=12
