tolong jawab dong plesase no 8 dan 9

8. 2x°+3x°+90°=180°
5x°+90°=180°
5x°=90°
x=18°
Masing-masing sudut:
3x=3(18)=54°
2x=2(18)=36°
90°=90°

9. (5x-22)°=(3x+16)°
(5x-3x)°=(22+16)°
2x°=38°
x°=19°