tolong kerjain ya no 1 A - 5 A

1. x+40+4x-10=180
=5x+30=180
=5x=150, x=30
BOC=4(30)-10=120-10=110°
2. 3x+10+2x+5=90
=5x+15=90
=5x=75
=x=25
ROQ= 2(25)+5=50+5=55°
3. KOL=180°
4. 3x-60=2x+10
x=70
AOC= 3(70)-60
=210-69=150°