Answer: x = 20 degree
3x = 3×20 which is 60 degree
And the other one is 100 degree
Add all the number 100+60+20 degree is 180 degree
Answer: x=9
Step-by-step explanation:
7x=2x+45
5x=45
x=9
Answer:

Step-by-step explanation:
Factor using the perfect square rule.
:)