Question

12. Find x if two angles of measures (x + 50° and (x - 20)° are
supplementary to each other.
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Answer 1

$\huge \fbox \red{Answer}$

(x + 50°) + (x - 20°) = 180°

x + 50° + x - 20° = 180°

2x + 30° = 180°

2x = 180° - 30°

2x = 150°

x = 150°/2

x = 75

Answer 2

Step-by-step explanation:

(x + 50°) + (x - 20°) = 180°

x + 50° + x - 20° = 180°

2x + 30° = 180°

2x = 180° - 30°

2x = 150°

x = 150°/2

x = 75