Tolong yah kak,,,,pake cra….

3x+2x-5=180
5x-5=180 DERJAT
5x=180+5
5x=185
x=37 DERJAT

<COB=3X
           =3(37)
            =111 DERJAT

3x + 2x – 5° = 180°
5x -5° = 180°
5x = 180° + 5°
5x = 185°
x = 185°/5
x = 37°