2x + 5y + 7x
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Combine like terms
(2x + 7x)
---
9x + 5y
Answer is 18 due to the theory cause
Answer:

Step-by-step explanation:
All the angles in a triangle add up to 
Every right angle triangle has a right angle in it which is 
So to find the remaining angle, you do
-
-
= 
Answer:
12
Explanation:
20 words do be annoying