Answer:
x=20
Step-by-step explanation:
Since supplementary angles =180 degrees, we need to write the equation as follows:
5x-30+x+90=180
Then you need to add like terms:
6x+60=180
Then you need to subtract 60 from both sides (60 and 180)
6x=120
Then divide both sides by 6 to get
x=20
I hope this helps!!
