Answer:
8. 43
9. 90
10. 38
11. 100
Step-by-step explanation:
8.
93 + (x + 44) = 180
137 + x = 180
x = 43
9.
(x + 20) + (x - 20) = 180
2x = 180
x = 90
10.
3x + (2x - 10) = 180
5x - 10 = 180
5x = 190
x = 38
11.
70 = x - 30
x = 100
