Answer:
40
Step-by-step explanation:
✯Hello✯
↪ So we know that angles on a straight line add up to 180 degrees
↪ So x+(4x-20)=180
↪ We can then solve this... this will be 5x-20=180
↪ When solving for x, add 20 to 180 which is 200, solving for x gives us 40
HOPE THIS HELPS :)
❤Gianna❤
