Simple arithmetic operation

I have no idea why I can't get this to work, if anybody can help i would appreciate it.

#!/bin/bash
x=`cat counter.txt | wc -l`
y= '$x / 7'
printf "%d People have visited this page" $y

You may go over bash's syntax.

1. It is better to use $() instead of `` in bash, a modern shell.
2. The syntax of Arithmetic expression in Bash: $(())
   y=$(($x / 7))
3. No "printf" command
   echo "$y People have visited this page"
4. Use "sh" instead of "bash", the former is usually a softlink to "bash"

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Try this :

echo "$(( $(wc -l < counter.txt) / 7 )) People have visited this page"