Réponse :
Knowing that the circle angle is 360° you can find using the following equation:
[tex]x+\frac{x}{4} +\frac{x}{2} +59=360[/tex]
You can then expand and reduce:
[tex]\frac{4x}{4} +\frac{x}{4} +\frac{2x}{4} =301[/tex]
So,
[tex]\frac{7}{4} *x=301[/tex]
Finally,
[tex]x=301*\frac{4}{7} =172[/tex]
