A, B and C lie on a straight line.
Given that angle
y
= 128° and angle
z
= 91°, work out
x
.

Answer:
y+what ever the angle inside=180 since its on a line
180-128=52
52+z+x=180since thats always the angles of a triangle added up
52+91+x=180
add
143+x=180
-143
x=37
Hope This Helps!!!