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CEMC Gauss (Grade 7), 2003

Geometry Difficulty 2.0 Junior Find the answer Canada

In the diagram, three lines meet at the points $A$ , $B$ and $C$ . If $\angle ABC = 50^\circ$ and $\angle ACB = 30^\circ$ , the value of $x$ is

(A) $80$ (B) $30$ (C) $100$ (D) $60$ (E) $50$

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