Question

I don't know how to do this.

Answer 1

Answer:

65

Step-by-step explanation:

Angles on a straight line always add up to 180

so we have to find angle BAC by subtracting 180° to 123°

180° - 123° = 57°

Angle BAC = 57°

Angles in a triangle add up to 180°

so we add 57 + 58 = 115°

and the we take 180° - 115 = 65 °

Angle x = 65°