Answer:

Explanation:
Value of x:-
Form an equation:
{opposite / vertical angles are equal}
Subtract 7x from both sides:


Subtract 24 from both sides:


Divide both sides by -3


Value of y and z:-
Value of x is 7 so replace x in the equations:

Now that we have the value of x, its easy to find y and z

{complete circle makes 360°}



Divide 256 by 2 to get value of each variable:
vertically opposite angles (y & z) are equal


∴ CHECK: 128 + 128 + 52 + 52 = 360°
hope this helps...