Question

Ray HX is an angle bisector of ∠THV, m∠THX = (6x + 5)°,

Answer 1

To find the measure of THX we will set THX and XHV equal to each other.

6x + 5 = 8x - 15
6x + 20 = 8x 
20 = 2x
10 = x

Now we can find the measure of THX by substituting in 10 for x,

6x + 5
6(10) + 5 
60 + 5
65

THX is 65

Hope this helps :)