Hello there,
Well, since lines n and m are parallel to each other and lines p and q are parallel to each other it means that there will be only two values as the answer, meaning the answer either has to be 100 degrees or 80 degrees because a straight line is equal to 180 degrees.
So, using this information you are able to fill in the blanks. The angle next to 100 degrees will be 80 degrees, the angle below will be 100. The angle next to 80 degrees will be 100 and the angle next to that will be 80. Then the angle below will be 100 degrees proving that x will be equal to 100 degrees also due to the angles being alternate exterior angles.
Answer: x = 100 degrees
- rose.