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Answer:
20.5°
Step-by-step explanation:
A=B(corresponding angles are equal)
2x=x+20.5
x=20.5
or
B=D(alternate angles)
D=11B
D=11(x+20.5)=11x+225.5
B=D
x+20.5=11x+225.5
10x= -205
x= -20.5
since angles can not be negative x= 20.5