I’ll mark brainlesttimed test the value of x is __

Itriangles sum of all the angles would be 180 degrees. all we have to do is add all the angles and set it equal to 180 degrees. so, (180-9x)+(9+x)+(5x)=180=194-3x=180=-3x=-14x=14/3

Hi there! we can use the exterior angles theorem to equate the expressions of angles t, s, and qrt together. here is what that should look like: 5x + 9 + x = 9xnow, just solve for x.5x + 9 + x = 9x6x + 9 = 9x-6x          -6x9 = 3x/3    /3x = 3therefore, the value of x is 3. hope this and have a marvelous day!