CAN YOU HELP ME WITH THIS

the sum of the expanded angle is 180⇒
[tex]40+40+2x+30=180\\2x=70\\x=35[/tex]
Answer:
x=35
Step-by-step explanation:
Add the 2 known angles: 80°
Then subtract them from eight since a straight line is 180°: 180-80= 100
then you have the equation: 2x+30=100
2x+30=100
-30 -30
2x=70
[tex]\frac{2x}{2}[/tex] =[tex]\frac{70}{2}[/tex]
x=35