Answer:
x = 130°
Step-by-step explanation:
Draw a line that is parallel to AB and parallel to DE (line CC')
∠CDE + ∠DCC' = 180° (same side interior angles)
80° + ∠DCC' = 180°
∠DCC' = 100°
∠ABC = ∠BCC' = 30° (alternate interior angles)
x = ∠DCC' + ∠BCC'
= 100° + 30°
= 130°
