n+(n+1)=12345

Solution for n+(n+1)=12345 equation:

Simplifying
n + (n + 1) = 12345

Reorder the terms:
n + (1 + n) = 12345

Remove parenthesis around (1 + n)
n + 1 + n = 12345

Reorder the terms:
1 + n + n = 12345

Combine like terms: n + n = 2n
1 + 2n = 12345

Solving
1 + 2n = 12345

Solving for variable 'n'.

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

Add '-1' to each side of the equation.
1 + -1 + 2n = 12345 + -1

Combine like terms: 1 + -1 = 0
0 + 2n = 12345 + -1
2n = 12345 + -1

Combine like terms: 12345 + -1 = 12344
2n = 12344

Divide each side by '2'.
n = 6172

Simplifying
n = 6172