In an inscribed quadrilateral, the sum of the opposite angles are always equal to 180 degrees
so that
10z +
(14z-7) + 8z = 180 degrees-------------(2)
From equation (2)
14z+8z= 180+7
22z = 187
22z/22 = 187/22
z= 8.5
From equation (1) and substituting for z
10(8.5) + 85 +