Find the value of x.
Angle TUV = Angle TUW + Angle WUV. Therefore, 9x+1 = 12x-20. If we subtract 9x from both sides, we get, 1 = 3x-20. Subtracting one from both sides will give us 0 = 3x-21. Thus, we see that 3x = 21 and x = 7.
