Question 493816
x^2 - 15x + 30 + 4x + 70 = 180
x^2 - 11x -80 = 0
(x + 5)(x - 16) = 0
x = 16
256 - 240 + 30 =  46 degrees.
4(16) + 70 = 134 degrees
134 + 46 = 180 degrees.
Cleomenius.