6+3n=-9-3n

Solution for 6+3n=-9-3n equation:

Simplifying
6 + 3n = -9 + -3n

Solving
6 + 3n = -9 + -3n

Solving for variable 'n'.

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

Add '3n' to each side of the equation.
6 + 3n + 3n = -9 + -3n + 3n

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

Combine like terms: -3n + 3n = 0
6 + 6n = -9 + 0
6 + 6n = -9

Add '-6' to each side of the equation.
6 + -6 + 6n = -9 + -6

Combine like terms: 6 + -6 = 0
0 + 6n = -9 + -6
6n = -9 + -6

Combine like terms: -9 + -6 = -15
6n = -15

Divide each side by '6'.
n = -2.5

Simplifying
n = -2.5