Answer:
Linear pair states that it is the pair of adjacent angle formed when two lines intersect.
If two angles form a linear pair then their sum add up to 180 degree.
Given that:
and are two angles form a linear pair.
Then by definition of linear pair;
Substitute the given values and solve for x;
Combine like terms;
Subtract 20 from both sides we get;
Divide both sides by 50 we get;
Then; the measure of these angles are;