The area of a rectangle is 72 cm square. The length of the rectangle is 6 cm longer than the width. What is the width of the rectangle? A 2 cm B 6 cm C 8 cm D 10 cm
The answer is B: 6 cm. You can use guess-and-check method, and plug the possible different answers into the equation x(x+6)=72, x stands for the width.
