Respuesta :

3.5x=42

x represents the length, since the formula to find area of a rectangle is width times length.

Answer:

[tex]A=3.5\cdot{x}[/tex]

Step-by-step explanation:

Area is defined as width mutiplied by length. We assume the desk is rectangle. The following equation represents the area of the desk:

[tex]A=3.5\cdot{x}[/tex]

A is the area and x is the length. We can therefore determine the length:

[tex]x=A/3.5=42/3.5=12[/tex]

The length is 12 ft