[tex]s = 36[/tex]
[tex] \frac{1}{3} s + 14 = 26 \\ subtract \: 14 \: from \: both \: sides \\ \\ \frac{1}{3} s = 12 \\ divide \: both \: sides \: by \: \frac{1}{3} \\ \\ s = 36[/tex]
