The perimeter of the rectangle is 7.8 cm, and one of its sides is 1.3 cm larger than the other. find the sides of the rectangle.

Let’s solve this problem using the equation.
Let the length of the rectangle be x centimeters, then the width is (x + 1.3) centimeters. We know that the perimeter of the rectangle is 7.8 centimeters. Let’s make the equation:
2 * (x + x + 1.3) = 7.8;
x + x + 1.3 = 7.8: 2;
x + x + 1.3 = 3.9;
x + x = 3.9 – 1.3;
x + x = 2.6;
x * (1 + 1) = 2.6;
x * 2 = 2.6;
x = 2.6: 2;
x = 1.3 centimeters – the length of the rectangle;
1.3 + 1.3 = 2.6 centimeters – the width of the rectangle.
Answer: 1.3 centimeters; 2.6 centimeters.