Answer:
7 is number of times length is longer than the width, x.
Step-by-step explanation:
The area of a rectangle with width x and length 7x is [tex]7x^2[/tex].
The area of the rectangle is [tex]length\times width[/tex]
Here width is x and the length is 7x. This means the length is 7 times width.
And the area is a [tex]7x^2[/tex] means 7 is number of times length is longer than the width, x.
Like, if x = 3
Then [tex]7x=7\times3=21[/tex]
