Answer:
They're the same angle. I would look up transversals so you could understand it a bit more. I'll upload a picture of a transversal in my answer but you should search it anyways.
Anyways,
To solve, you set 160 equal to the other side.
160 = 3x + 10
150 = 3x
x = 50
Multiple by a both sides and the a in the first side will be canceled with the multiplication of a it will be x+b=ac and then you subtract b from both sides.
THE ANSWER WILL BE. X=ac-b
2a) 0.50,0.30
2b) monday and friday
2c) 80degrees