Respuesta :

Answer:

x = 22°

Step-by-step explanation:

The angles of a triangle add to 180°, so:

69 + (3x - 4) + (3x - 17) = 180

(3x - 4) + (3x - 17) = 111

6x - 21 = 111

6x = 132

x = 22

Answer:

22

Step-by-step explanation:

(3x - 4)° + (3x - 17)° + 69° = 180°

6x - 21 + 69 = 180

6x + 48 = 180 ⇒ x = 22

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