Jawab:
2. Tentukan nilai x!
a. 180°= 3x + (5x + 20°)
> 180°= 8x + 20°
> -8x = 20° - 180°
> -8x = -160°
> x = 20°
b. 90°= 2x + (x+22) + x
> 90°= 4x + 22
> -4x = 22 - 90
> -4x = -68
> x = 17°
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Jawab:
2. Tentukan nilai x!
a. 180°= 3x + (5x + 20°)
> 180°= 8x + 20°
> -8x = 20° - 180°
> -8x = -160°
> x = 20°
b. 90°= 2x + (x+22) + x
> 90°= 4x + 22
> -4x = 22 - 90
> -4x = -68
> x = 17°