Respuesta :

AnimeBrainly
x = 78, because 
1) The last angle (the one without the X, equals 24 degrees)
2) 180 - 24 = 156
3) 156/2 = x
x = 78

hope this helps
choixongdong
x + x + 24 = 180
2x = 156
  x = 78

answer
B. 78

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