Question 482429
3x - 16 + angle = 180
x + angle = 90 ; angle = 90 - x
substitute into equation 1.
3x -16 + 90 - x = 180
2x + 74 = 180 
2x = 106
x = 53 ; this is the complement.
90 - 53 = 37; this is the angle
3(53) - 16 = 143, this is the supplement.
Cleomenius.