Question

a rectangular computer screen has an area of A square inches. the width of the computer screen is 7 inches. which equation x, the length of the computer screen in inches?

Answer 1

The question is not perfectly clear, but I assume you're asking something like this:

in a rectangle, the area is given by
`A=wl`

where A is the area, w is the width and l is the length.

So, if we know that the width is 7 and we let x be the length of the rectangle, we have

`A=7x`

If you need to solve this for x, divide both sides by 7:

`x=(A)/(7)`