I would love to help you, But I can't draw a picture. Draw 24 with 2 base tens and 4 ones. Take away 20. I THINK that the last part is saying that you can add stuff to your result to get the number you had before.( THIS IS PROBABLY NOT TRUE, JUST LETTIN YA KNOW ME THOUGHTS)
Since it is stated that angle x forms a straight line with the 50 and 50 degree angles, and that angle x is vertical to angle y, we can do 40+50+y=180 to find angle Y.
