Answer:
[tex] \huge \boxed{s=6}[/tex]
[tex] \boxed {\frak{Step \: by \: step \: explanation:}}[/tex]
[tex]Given,3(s+4)=30[/tex]
[tex]3s + 12 = 30[/tex]
[tex] \boxed{Subtract 12 from \: both \: sides \: of \: the \: equation}[/tex]
[tex]3s + 12 - 12 = 30 - 12[/tex]
[tex]3s = 18[/tex]
[tex] \boxed{Divide \: both \: sides \: of \: the \: equation \: by \: the \: same \: term}[/tex]
[tex] \large{ \frac{3s}{3} = \frac{18}{3} }[/tex]
[tex] \boxed{s = 6}[/tex]
[tex] \frak{EtherealMistress}[/tex]
