The perimeter of a triangle is 38.7 cm. Find the sides of the triangle if their lengths are 2/3/4 in length.

Let’s solve this problem using the equation.
Let the length of the first side be 2 * x centimeters, then the length of the second side is 3 * x centimeters, and the length of the third side is 4 * x centimeters. We know that the perimeter of a triangle is 38.7 centimeters. Let’s make the equation:
2 * x + 3 * x + 4 * x = 38.7;
x * (2 + 3 + 4) = 38.7;
x * (5 + 4) = 38.7;
x * 9 = 38.7;
x = 38.7: 9;
x = 4.3 centimeters;
4.3 * 2 = 8.6 centimeters – the length of the first side of the triangle;
4.3 * 3 = 12.9 centimeters – the length of the second side of the triangle;
4.3 * 4 = 17.2 centimeters – the length of the third side of the triangle.
Answer: 8.6 centimeters; 12.9 centimeters; 17.2 centimeters.