Answer:
6x = 42
Explanation:
The formula to find the area of a rectangle is
. Since we have a value for the width, we simply need to find what to multiply to 6 to get 42.
Let x = length
6x = 42
We then divide both sides by 6 to find the value of x.


So we know the length is 7.
To check the answer we substitute x with 7.

