Answer:
x = 100° || y = 20°
Step-by-step explanation:
Two pairs of parallel lines visible.
Create equations 1 and 2:
x - 2y = 60°
x + y = 120°
Make the x subject:
x - 2y = 60°
x = 60° + 2y ........equation 1
x + y = 120°
x = 120° - y ........equation 2
Solve them simultaneously:
120° - y = 60° + 2y
2y + y = 120°- 60°
3y = 60°
y = 20°
If y is 20° then the x is:
x = 120° - y
x = 120° - 20°
x = 100°
