Find x from the angles of a triangle

The three angles add to 180°.

1. The angles of a triangle are x°, (x − 1)° and (3x + 11)°. Find x.
2. The angles of a triangle are x°, (3x + 13)° and (x + 12)°. Find x.
3. The angles of a triangle are x°, (3x − 10)° and (3x − 55)°. Find x.
4. The angles of a triangle are x°, (x + 11)° and (2x + 13)°. Find x.
5. The angles of a triangle are x°, (3x + 18)° and (x + 17)°. Find x.
6. The angles of a triangle are x°, (x + 3)° and (3x + 17)°. Find x.
7. The angles of a triangle are x°, (2x + 10)° and (2x − 10)°. Find x.
8. The angles of a triangle are x°, (3x − 13)° and (x − 7)°. Find x.
9. The angles of a triangle are x°, (3x + 7)° and (x + 3)°. Find x.
10. The angles of a triangle are x°, (x + 15)° and (3x)°. Find x.
11. The angles of a triangle are x°, (x + 2)° and (2x + 38)°. Find x.
12. The angles of a triangle are x°, (x − 9)° and (2x + 57)°. Find x.
13. The angles of a triangle are x°, (x + 7)° and (3x + 28)°. Find x.
14. The angles of a triangle are x°, (x + 10)° and (2x + 30)°. Find x.
15. The angles of a triangle are x°, (2x + 18)° and (3x − 24)°. Find x.
16. The angles of a triangle are x°, (3x − 9)° and (2x + 39)°. Find x.
17. The angles of a triangle are x°, (3x + 13)° and (3x − 1)°. Find x.
18. The angles of a triangle are x°, (2x + 4)° and (2x − 9)°. Find x.
19. The angles of a triangle are x°, (3x − 7)° and (x + 22)°. Find x.
20. The angles of a triangle are x°, (2x − 2)° and (x + 30)°. Find x.