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1. The length of the third side of triangle is 3x-2.

   According to the statement

   we have to find that the side of the triangle with the help of the perimeter.

   So, For this purpose, we know that the

   The perimeter of the triangle will be the sum of all the three sides. According to the given information:

   The perimeter of a triangle is 9x + 4.

   One side of the triangle is 2x – 5 and

   another side is 4x + 11.

   Let the another side be a x.

   Then

   Perimeter = 1st side + 2nd side+3rd side

   9x + 4 = 2x – 5 + 4x-11 + 3rd side

   9x + 4 = 6x -15 + 3rd side

   3x – 2 = 3rd side

   3rd side = 3x – 2

   So, The length of the third side of triangle is 3x -2.

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