Question

Find the unknown sizes of angles ​

Answer 1

The two lines are parallel, with two transversals.

20 + x = y. (alternate interior angles).

90 - y = x (corresponding angles).

In equation 1,

y - x = 20

y + x = 90

2y = 110

y = 55

x = y - 20

x = 33.

Hope this helps!