Since vertical angles are congruent, (4x+7)=5(x-4). So simplifying we get 4x+7=5x-20. If we add 20 on both sides we get 4x+27=5x. Now when we subtract x from both sides, we get x=27
To trisect an angle, you would use 2 rays.
Say the first 3 were 60 seconds and the other 2 were 70 seconds
that comes to 180 sec. and 140 sec. 180+140=320
320 seconds
