Question

Sum of an angle and half of its coplementary angle is 75° find tghe anle

Answer 1

let the angle be x
now,
 x + (90-x)/2 = 75
 (2x+90-x)/2 = 75
 2x+90-x = 75×2
 x+90=150
 x = 150-90
 x=60

∴ the angle = 60°
 

Answer 2

See the attach file for ans