To find the width available for each computer, we can set up the equation based on the total space available and the space taken up by the printer.
- Total space available: 22 feet
- Space taken by the printer: 4 feet
- Let \( x \) represent the width of each computer.
- There are 3 computers, so the total space taken by the computers is \( 3x \).
The equation representing the space used is:
\[ 3x + 4 = 22 \]
This equation allows you to solve for the width \( x \) of each computer.