Respuesta :

From , the properties of triangle;

Angle M + Angle N + Angle O = 180

(3x -16) + (x + 6) + x = 180

3x - 16 + x + 6 + x = 180

5x - 10 = 180

5x = 180 + 10

5x = 190

x = 190/5

...

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