a. (3-2) Find the value of x
below:

Answer:
[tex]x = -8[/tex]
Step-by-step explanation:
Given
The attached figure
Required
Find x
The given angles (135 and x +143) are vertically opposite angles.
So:
[tex]x + 143 = 135[/tex]
Collect Like Terms
[tex]x = 135-143[/tex]
[tex]x = -8[/tex]