tentukan nilai x pada gambar di bawah ini

1.
a. 4x° + 2x° = 90
= 6x = 90
= x = 90/6
= x = 15°

b. 2x° + 3×° = 180
= 5x = 180
= x = 180/5
= x = 36°

c. x° + 2x° + 120° = 360°
= x + 2x = 360° - 120°
= 3x = 240
= x = 240/3
= x = 80°

semoga membantu
Maaf, kalau salah

a) 4x + 2x = 90
    6x = 90
    x = 15
    
b) 2x + 3x + 90 = 180
    5x = 90
    x = 18
 
c) 120 = 2x
    x = 60
    
   Semoga Membantu