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Step-by-step explanation:
Given : AB || CD
angle CAB + angle ACD = 180°
[Sum of co-interior angles = 180]
22° + angle ACD = 180°
Angle ACD = 180° - 22°
Angle ACD = 158°
Angle ACD + angle ECD + angle ECA = 360°
158° + 90° + y = 360°
248° + y = 360°
y = 360° - 248°
y = 112° Answer
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