Answer:

Step-by-step explanation:
Parenthesis
exponents
multiplication/division
addition/subtraction
when given a math problem you must go through these operations from top to bottom to recieve the correct answer
Answer:
x = 5°
Step-by-step explanation:
5x + 21° + 20x + 34° = 180°
25x + 55° = 180°
25x = 180° - 55°
25x = 125°
x = 125°/25
x = 5°
Hope you got it dear !!!!