Answer:
x = 109
Step-by-step explanation:
122 + α = 180
α = 180 - 122
α = 58
51 + 58 + Θ = 180
109 + Θ = 180
Θ = 180 - 109
Θ = 71
x + Θ = 180
x + 71 = 180
x = 180 - 71
