Answer:
Let the required angle be x
7). [tex]x + 22 = 66 \\ \boxed{x = 44°}[/tex]
44° is the right answer.
8). [tex]x + 60 = 110 \\ \boxed{x = 50°}[/tex]
50° is the right answer.
9). [tex]x + 75 = 105 \\ \boxed{ x = 30°}[/tex]
30° is the right answer.
10). [tex]x = 31 + 87 \\\boxed{ x = 118°}[/tex]
118° is the right answer.
