Exterior Angle Calculation

Hard Geometry Lines And Angles

In the diagram below, line segment AB is extended to point C, creating an exterior angle at point B. If angle CAB measures $30^{\circ}$ and angle ABC is represented as $x$, what is the measure of angle ABC?

Angle ABC measures $150^{\circ}$

Angle ABC measures $90^{\circ}$

Angle ABC measures $120^{\circ}$

Angle ABC measures $60^{\circ}$

Hint

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