We will call the number of tickets you sell [tex]x[/tex] and the number your friend sells [tex]y[/tex]. Given this, we can create the first equation, which is:
[tex]x = y + 14[/tex]
We can also create the second equation:
[tex]x + y = 58[/tex]
Thus, our system would be:
[tex]x = y + 14[/tex]
[tex]x + y = 58[/tex]