Question

Can someone please explain this to me? I don't get it​

Answer 1

x + 105° = 180° they are supplementary
180°-z = y bc z+y is a straight line, equaling 180°
x=z they are vertical angles

Answer 2

A straight line is equal to 180, anything going all around is 360 if the angles are crossing eachother then the angles across from eachother are equal so x=z
X+150=180, Im not good at explaining sorry, but i know what I’m doing yk just lmk sorry if it didn’t help