Answer:
x=16, y=26, z=13
Explanation:
opposite angles are congruent so (3x+30)=(4x+14)
Solve for x
x=16
adjacent sides are supplementary so insert x in both equations just to make sure it is correct and you get 78
so 3y=78 and 6z=78
solve for y and z
y=26, z=13