x=15 from the previous problem that I answered for you
Since (x+10) and that one blank angle are supplementary, they add up to 180 degrees.
x+10+y=180
15+10+y=180
25+y=180
y=155
Both unlabeled angles, due to the fact that they are vertical to each other, equal 155 degrees.
We also could figure this out by just taking 25 (the angle measurement of the labeled angles) and subtracting that from 180 without doing all of the fancy equation stuff.
Great question!! :)
