Question

Simplify {n - 1 - [n - 1 - (n - 1)]}.

Answer 1

Answer: the correct answer is n-1

Answer 2

{n-1-[n-1-(n-1)]} | Given
{n-1-[n-1-n+1]} | Distribute most inner negative
{n-1-n+1+n-1]} | Distribute next inner negative
n-1 | Simplify like terms