The perimeter of the rectangle is 80 cm. What are the length and width of the rectangle

The perimeter of the rectangle is 80 cm. What are the length and width of the rectangle if the width a is 4 times less than the length?

Let’s solve this problem using the equation.
Let the width of the rectangle be x centimeters and the length 4 * x centimeters. We know that the perimeter of this rectangle is 80 centimeters. Let’s make the equation:
4 * x + x = 80;
x * (4 + 1) = 80;
x * 5 = 80 (in order to find an unknown factor, you need to divide the product by a known factor);
x = 80: 5;
x = 16 centimeters – the width of the rectangle;
16 * 4 = 64 centimeters – the length of the rectangle.
Answer: 16 centimeters; 64 centimeters.