Respuesta :

Step-by-step explanation:

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I am giving you a hint

sum of all angles in a triangle is 180 degrees use this hint to solve

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Answer:

The value of x = 8

Step-by-step explanation:

The sum of angles of a triangle = 180°

=> 65° + 76° + 6x - 9 = 180°

=> 132° +6x = 180

=> 6x = 180 - 132

=> 6x = 48

=> x = 48/6

=> x = 8

and

(6x-9) = 6(8) -9 = 48-9 = 39