Answer:
x = 4
Step-by-step explanation:
Perimeter of triangle = sum of all sides
Side 1: 14 - 2x
Side 2: 3x - 1
Side 3: 2x + 1
Perimeter= side 1 + side 2 + side 3
26 = 14 - 2x + 3x - 1 + 2x + 1
26 = 14 - 1 + 1 - 2x + 3x + 2x
26 = 14 + 3x
3x = 12
x = 12/3
x = 4
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