Answer:
Option D is correct
The value of x is, 31 degree
Step-by-step explanation:
Supplementary Angles:
Tow angles are supplementary when they are add up to 180 degree.
As per the statement:
If ∠A and ∠B are supplementary and
and
By definition of supplementary angle:
⇒
Substitute the given values we have;
Combine like terms;
Add 6 to both sides we have;
Divide both sides by 6 we have;
Therefore, the value of x is, 31 degree.