=3+(n-1)

Solution for =3+(n-1) equation:

Simplifying
0 = 3 + (n + -1)

Reorder the terms:
0 = 3 + (-1 + n)

Remove parenthesis around (-1 + n)
0 = 3 + -1 + n

Combine like terms: 3 + -1 = 2
0 = 2 + n

Solving
0 = 2 + n

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-1n' to each side of the equation.
0 + -1n = 2 + n + -1n
Remove the zero:
-1n = 2 + n + -1n

Combine like terms: n + -1n = 0
-1n = 2 + 0
-1n = 2

Divide each side by '-1'.
n = -2

Simplifying
n = -2