The perimeter of the rectangle is 54 cm, and its width is 3 cm less than the length. Find the sides of the rectangle.

1. Let the width of the rectangle be equal to y. then the length is 3 + y. Adding twice the length and width, we get the perimeter. Let’s solve the equation:
2y + 2 * (3 + y) = 54,
2y + 6 + 2y = 54,
4y = 54 – 6,
4y = 48,
y = 48/4,
y = 12.
2. Find the length of the rectangle:
3 + 12 = 15 cm.
Answer: The length of the rectangle is 15 cm and the width is 12 cm.