Question

find the perimeter of the given triangle
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Answer 1

Answer:

Perimeter = sum of all sides

= 3x - 7 + 2x + 5 - x + 11

= 4x + 9

Perimeter of the triangle is 4x + 9

Answer 2

As we know that :

Perimeter of triangle = Sum of all the sides

=> Perimeter if triangle = (3x-7)+(2x+5)+(-x+11)

=> 3x+2x-x-7+5+11

=> 4x+9

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