50 point Please help. Thank you :)

Question 1 What is the value of x?

Question 2 What is the value of x?
A:x=15
B:x=30
C:x=37.5
D:x=52.5

Question 3 What is the measure of angle z in this picture?

.

.

the angles are in linear pairs...

so,

=>(10x-20)+(6x+8)=180°

=>10x-20+6x+8=180

=>16x-12=180

=>16x=192

=>x=192/16=12

43+x=180

x=180-43

x=137°it's not mentioned in the option

value of z°=137°

because,

x°=z°(vertically opposite angles)

therefore,

z°=137°

b

Step-by-step explanation:

c. (3,2,6) is the answer.