What is the answer to this question here ? ?

Same-side interior angles where a transversal meets parallel lines are supplementary. That means

... 60° + (2x -y)° = 180°

... 40° + (2x +y)° = 180°

You can subtract the second equation from the first and you get

... 20° -2y° = 0°

... 10 = y

Checking the two answers where y=10 in either of the above equations, you find the only one that works is ...

... B. x = 65, y = 10

x-1 multiple 2x-1 = f(-x)