Answer:
x = 18
Step-by-step explanation:
Vertically opposite angles are equal.
x + x + x + 90 = 144
3x + 90 = 144
Subtract 90 from both sides
3x = 144 - 90
3x = 54
Divide both sides by 3
x = 54/3
x = 18
The answer is A should be right
1. -5y-35
2. 44+24 or 68
3. 48+6m
You get the gist.
7. 9c+5d
8. 10m+12k
9. 13s+4t
10. 12c+5d
11. -20g-16h
12. 19x+3y