Okay, here we have this:
Considering the provided information, we are going to wirte the requested expression, so we obtain the following:
[tex]SaturdayVisitors=FridayVisitors*5+12[/tex]Then replacing with the given information:
[tex]\begin{gathered} SaturdayVisitors=39*5+12 \\ SaturdayVisitors=195+12 \\ SaturdayVisitors=207 \end{gathered}[/tex]Finally we obtain that the park has 39 visitors in friday, and 207 on saturday.