The perimeter of an isosceles triangle is 40 cm. Its base is 7 cm larger than the lateral side

The perimeter of an isosceles triangle is 40 cm. Its base is 7 cm larger than the lateral side, calculate the lengths of the sides of the triangle.

1. The base of the triangle is x centimeters.

2. Let’s calculate the value of its lateral side.

(x – 7) centimeters.

3. Let’s compose the equation.

x + (x – 7) * 2 = 40;

x + 2x – 14 = 40;

3x = 40 + 14 = 54;

x = 54/3 = 18;

x = 18;

Answer: The base is x = 18 centimeters, the side is x – 7 = 18 – 7 = 11 centimeters.