Your question was:
A triangle with an angle of 74, 6z, z+36 degree
=> apply rule: sum of the interrior angle of a triangle is 180
180 = 6z+74+z+36
=> solve for z
[tex]6z+z+74+36=180[/tex]
[tex]7z=70[/tex]
z= 10
Therefore, the other angles are
10+36=46 degree
6*10=60 degree
and
z = 10 degree