Explanation:
5x - 5° = 40° ( being vertically opposite angles)
5x = 40° + 5°
5x = 45°
x = 45°/ 5
x = 9°
Now
< 1 = 5 * 9° - 5 = 45° - 5° = 40°
Hope it will help :)
4.5m questions
5.8m answers