Question

Find the perimeter of a triangle one side 3 x-7 ,second Side 2 × + 5 ,third side - x + 11.​

Answer 1

$a = 3x - 7 \\ b = 2x + 5 \\ c = 11 - x \\ perimeter = a + b + c \\ = 3x - 7 + 2x + 5 + 11 - x \\ = 4x + 9$

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