Answer for 1st set:
m∠1=105° and m∠2=75°
Breakdown:
You're given one angle of 75°. That one angle is equal to m∠2. Since m∠2 is making a linear pair with m∠1, you take 180° (Straight line) and take 75° from it.
180-75=105
Answer for 2nd set:
m∠1=130° and m∠2=50°
Breakdown:
Using the same logic as before, linear pair, blah-blah-blah, you're given 130.
180-130=50