The 80 degree part is corresponding to 2x so use a one step equation for that one, 80=2x 80/2= 40, x=40. The two lines are parallel so they are equal, using another one step equation 80=5y, 80/5=16 y=16. For the next one 30 and w are perpendicular to the right angle beside it so 90-30= 60, w=60. 3y and x are on a supplementary angle so 180= 3y, y=60, 180-60=90, z=90, 5x+4=90-4=86/5=17.2, x=17.2
