<X = 48 degrees, <Y = 8X-3, W = 18X+5
Since it's a triangle we know that it equals 180 degrees.
So take 8X-3+18X+5+48=180
Add your like terms together which makes, 26X+50=180
Now you're going to subtract 50 from 180 which leaves you with 26X=130
Now divide your sums which leaves you X which = 5
You should be able to plug X back into your equation to find <Z. Hope this helps.