Respuesta :
[tex] \bf \stackrel{\textit{before lunch miles}}{m}+\stackrel{\textit{after lunch miles}}{49}=\stackrel{\textit{total miles}}{130}
\\\\\\
m=130-49\implies m=81 [/tex]
[tex] \bf \stackrel{\textit{before lunch miles}}{m}+\stackrel{\textit{after lunch miles}}{49}=\stackrel{\textit{total miles}}{130}
\\\\\\
m=130-49\implies m=81 [/tex]