The sum of all internal angles is 180° ever , then sum the angles and equals to 180
[tex](96)+(2x)+(x+12)=180[/tex]
simplify
[tex]\begin{gathered} 96+2x+x+12=180 \\ 3x+108=180 \end{gathered}[/tex]
and solve for x
[tex]\begin{gathered} 3x=180-108 \\ 3x=72 \\ x=\frac{72}{3}=24 \end{gathered}[/tex]
Value of x is 24
