6n+9=-3n−21−6 solve for n show steps : )

6n + 9 = -3n - 21 - 6simplify the right hand side
6n + 9 = -3n - 27 add 3n to both sides
6n + 9 + 3n = -3n + 3n - 27simplify
9n + 9 = -27subtract 9 from both sides
9n + 9 - 9 = -27 - 9...simplify
9n = - 36divide both sides by 9
(9/9)n = -36/9simplify
1n or just n = - 4

expand it, simplify it, multiply it, hurry it up, your done

Step-by-step explanation: