Write a simplified expression for the perimeter of the triangle.

Answer: 2x + 4
Step-by-step explanation:
(x - 1) + (-x + 1) + (2x + 4)
Put like terms together
2x + x - x - 1 + 1 + 4
Combine like terms
2x + 0 + 0 + 4
2x + 4