Step 3:
5x + 20 + 3x + 9x + 7 becomes
5x + 3x + 9x + 20 + 7
Step 4:
(5x + 3x + 9x) + (20 + 7)
Step 5:
17x + 27
If you have any further questions feel free to ask.
Hope this helps

Step-by-step explanation:

Ans: The measure of exterior angle i.e angle A is -52⁰.
You meant to say that the measure of an angle A is on exterior angle so let me elaborate it you clearly,

One million two hundred eighty nine thousand three hundred four
Answer:
Step-by-step explanation:
a) 14x
b)-40c
c)8n
d)28x
e)8n
f)-15/2y= - 7 1/2 y