Answer:
L=22
Explanation:
For the area of a rectangle you have to multiply the width by the length.
This problem would look like L*W=A. Being that you already have the area and the width, you would just have to fill in for these.
L*6.5=143
Then just follow the rules of PEMDAS to sole for L. In this case this would be dividing 6.5 by both sides.
L=22