Tolong ya kak pakai cara
[tex]2x + 60π = 180° \\ 2x = 180° - 60° \\ x = \frac{120°}{2} \\ x = 60° \\ \\ 3y = 60° \\ y = \frac{60°}{3} \\ y = 20° \\ \\ 4z = 2x \\ 4z = 2.60° \\ z = \frac{120°}{4} \\ z = 30° \\ \\ x + y + z \\ 60° + 20° + 30° \\ 110°[/tex]
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