tolong dong jawabannya brpa?Dengan caranya yaaa

x = 5°  y = 20'  z = 30"
2x - 9y + 18 z = ...."
= 10° - 180' + 540''
= 10 ( 60) " - 180' + 540/60 
= 600 - 180' + 9"
= 429'

semoga membantu