Answer:
The length should be 7x+9
The length is 7x+9
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
7.2m questions
9.6m answers