Answer:
x = 85°
Explanation:
A linear pair is a pair of adjacent angles that are supplementary, meaning that their sum is 180 degrees.
Using this:
We have:
x° + 55° + 40° = 180°
Simplify like terms
x° + 95° = 180°
Subtracting 95° on both sides,
x° + 95° - 95° = 180° - 95°
x° = 85°
Therefore, the measure of angle x is 85°