Answer:
x = -4°
Explanation:
We know that,
→ Sum of angles of straight line is 180°.
Now we have to,
→ Find the required value of x.
Forming the equation,
→ (54°) + (7x + 154°) = 180°
Then the value of x will be,
→ 7x + 154° + 54° = 180°
→ 7x + 208° = 180°
→ 7x = 180° - 208°
→ 7x = -28°
→ x = -28° ÷ 7
→ [ x = -4° ]
Hence, the value of x is -4°.