Answer:
x=9; z=117
Explanation:
step one) write it as an equation
7x + 31 = 94
(the opposing angles are equal due to two lines intersecting at a point)
7x = 94 -31
7x = 63
x = 9
step two) and since angles around a point add up to 360°, subtract 94° and (63°+31°) and divide the remainding amount by two
360 - 94 - (63+31) = 2z
234 = 2z
117 = z