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I Need Some Help I Will Try To Give Brainliest class=

Sagot :

9514 1404 393

Answer:

  x = 100

Step-by-step explanation:

The two marked angles are a linear pair, so their sum is 180°.

  57° +(x +23)° = 180°

  x = 100 . . . . . . . . . . . . . divide by °, subtract 80