Given data:
The given angle is ∠1=149°.
The expression for linear pair is,
[tex]\angle1+x=180^{\circ}[/tex]
Substitute the given value in the above expression.
[tex]\begin{gathered} 149^{\circ}+x=180^{\circ} \\ x=31^{\circ} \end{gathered}[/tex]
Thus, the value of x is 31°.
