From the figure we notice that the two bottom angles are equal. We also know that the angle DXG is equal to 98, then we have that:
[tex](4s-2)+(s-1)+(s-1)=98[/tex]
solving for s we have:
[tex]\begin{gathered} (4s-2)+(s-1)+(s-1)=98 \\ 6s-4=98 \\ 6s=98+4 \\ 6s=102 \\ s=\frac{102}{6} \\ s=17 \end{gathered}[/tex]
Therefore s=17
