3-9=n

Solution for 3-9=n equation:

Simplifying
3 + -9 = n

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

Solving
-6 = 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.
-6 + -1n = n + -1n

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

Add '6' to each side of the equation.
-6 + 6 + -1n = 0 + 6

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

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

Divide each side by '-1'.
n = -6

Simplifying
n = -6