Answer: x=5, angle 1 = 140 degrees, angle 2 = 40 degrees, angle 3 = 65 degrees
Step-by-step explanation:
1)
19x-18=(7x+1)+(10x-9)
19x-18=17x-8
2x=10
x=5
2)
angle 1 = 60+80
angle 2= 180-(60+80) or 180-angle 1
angle 3 = 180 - (180-105) - angle 2 = 105 - angle 2
