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The first side of a triangle is 9 meters shorter than the second side. The third side is 3 times as long as the first side. The perimeter is 39 meters. Find the length of the longest side.

Respuesta :

Answer:

The longest sides is 18 m long.

Step-by-step explanation:

Let x meters be the length of the first side.

The length of the second side = x+9 m.

The length of the third = 3x m.

Perimeter = x + 3x + x + 9 = 39

5x + 9 = 39

5x = 30

x = 6 m.

The other 2 sides are  6+9 = 15 m and 3*6 = 18 m.

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