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:

55

step-by-step explanation:

a and c

for infinitely many solutions we require both left and right sides to be equal

distribute and simplify

a

14 - 8x = 20 - 8x - 6 = 14 - 8x ← both sides equal so infinite solutions

b

6x - 54 = 6x - 54 + x = 7x - 54 ← not equal

c

4x + 16 = 4x + 10 + 6 = 4x + 16 ← both sides equal so infinite solutions

d

5x - 40 + 10 = 5x + 10

5x - 30 = 5x + 10 ← not equal