Bisect means that the angles are split equally.
RTV would be half of RTS
RTV = 1/2(RTS)
16x-6 = 1/2(26x+18)
Simplify:
16x - 6 = 13x +9
Subtract 13x from both sides:
3x - 6 = 9
Add 6 to both sides:
3x = 15
Divide both sides by 3:
x = 5
Now you have x, replace x in the equation for RTV:
RTV = 16x -6 = 16(5) -6 = 80 - 6 = 74
RTV = 74 degrees.
