Respuesta :

wegnerkolmp2741o

Answer:

The length is 7x+9

Step-by-step explanation:

We know that area equals length times width

A = l*w

63x+81 = l*9

The area is 63x+81 and the width is 9

Divide each side by 9

63x/9 +81/9 = 9l/9

7x +9 = l

The length is 7x+9

Answer:

The length should be 7x+9