Answer:
The first one are alternate interior angles and x=6. The second one are corresponding angles and x=5
Explanation
1.) The first ones are alternate interiors because they are both interior and alternating (I honestly don't know how to explain that) and x=6 because 15x+5=95 so that means 15x=90 and 90/15=6.
2.) The second one are corresponding angles because they have the same relative location on the transversal and x=5 because algebra.
We can do 23x - 2 = 8 + 21x. Then we combine like terms by doing same to both sides:
23x - 2 = 8 + 21x
-21x +2 =+2 -21x
2x = 10
Then divide both sides by 2
2x = 10
/2 /2
x = 5
I hope this makes sense