Answer:
x+63°+36°=180°(angle sum property in first triangle)
x+99°=180°
x=180°-99°
x=81°
x + z=180
81°+z=180°
z=180°-81°
z=99°
z+13°+y=180(angle sum property in second triangle)
99°+13°+y=180
112°+y=180°
y=180°-112°
y=68°
therefore, x=81° z=99° y=68°
hope it helps you
