Respuesta :

altavistard

Answer:

x = 8

Step-by-step explanation:

Recall that the interior angles of a triangle always add up to 180 degrees.

Therefore:  77 + 50 + 7X - 3 = 180, or:

                   77          + 7X - 3 = 130, or:

                                     7x      = 56

Dividing both sides by 7 yields x = 8

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