n+6=(n+6)-9

Solution for n+6=(n+6)-9 equation:

Simplifying
n + 6 = (n + 6) + -9

Reorder the terms:
6 + n = (n + 6) + -9

Reorder the terms:
6 + n = (6 + n) + -9

Remove parenthesis around (6 + n)
6 + n = 6 + n + -9

Reorder the terms:
6 + n = 6 + -9 + n

Combine like terms: 6 + -9 = -3
6 + n = -3 + n

Add '-1n' to each side of the equation.
6 + n + -1n = -3 + n + -1n

Combine like terms: n + -1n = 0
6 + 0 = -3 + n + -1n
6 = -3 + n + -1n

Combine like terms: n + -1n = 0
6 = -3 + 0
6 = -3

Solving
6 = -3

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.