Respuesta :

evgeniylevi

Answer:

x=17.

Step-by-step explanation:

1) the unknown inside third angle of the triangle is: 180-(8x-11);

2) the sum of all the angles in the triange is 180, it can be written:

180-(8x-11)+5x+(2x+6)=180;

3) the required value of x is: 17

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