The answer is 39 degrees.
The answer would be 75 width
I am not good at this I tried and I’m sorry but I don’t know
1. Move the negative sign to the left.
- 
*-50
2. Use this rule: 

=
-
3. Simplify - 
4. Move the negative sign to the left.
-(-950x/8)
5. Simplify 950x/8 to 475x/4
6. Remove parentheses.