Question

Guys please answer it fast

Answer 1

Hello friend

Here's your answer

Draw a line FG passing through E and parallel to AB and CD

Consider CD parallel to FG

Angle DCE+ angle CGE=180(co interior angles)

100+angle CGE=180

Angle CGE=80
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Consider AB parallel to FG

Angle ABE+angle BEF=180

120+angle BEF=180

Angle BEF=60

Angle CGE+ BEF+ BEC=180(linear pair)

Angle BCE(x)=180-80-60

x=180-140

x=40°

Hope it helps!