Explanation:
Hey there!
Looking through figure,
z= 76° {vertically opposite angle are equal}
z+(13x+13°) = 180°{Being linear pair}
76° + 13x + 13°=180°
13x = 180° - 89°
13x = 91
x =91/13
x = 7°
Therefore, X= 7° and z= 76°.
Hope it helps...
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