Answer:
11) x = 45
12) x = 30
Step-by-step explanation:
11)
3x + x = 180
4x = 180
x = 45
12)
4x = 5x - 30
4x - 5x = -30
-x = -30
x = 30
The answer is a=6, b=4, and 0=3 you can always try to find the answer in google though
Hope that helped
∠СXA = ∠BXA + ∠СXB = 30°20' + 40°35' = 70°55'
