Answer:
1. x=44
Explanation:
For number 1, the two given angles equal each other. So set them both equal to each other,
2(x+10)=3(x-8) and solve for x from there.
For number 2, there are no given numbers, but we know angle 1 and angle 7 equal each other. So then, we know angle 3 also equals 1 and 7. Then, angle 2 is supplementary to angle 3. We then know angle 5 is also equal to 1,3,7. They intersect perfectly to prove lines a and b are parallel.