[tex]x-\ number\ of\ playlist\ on\ Clarann's\ ipod\\
(x-12)- number\ of\ Karen's\ playlist\\\\
x+x-12=58\\
2x-12=58\ \ \ |Add\ 12\\
2x=58+12\\
2x=70\ \ \ |Divide\ by\ 2\\\\
x=35\\ 35-12=23\\\\
\textbf{Clarann's\ ipod\ has\ 35\ playlists\ and\ Karen's\ 23. }[/tex]
