First you want to distribute, keep in mind you cannot add in the parentheses because they are NOT like terms. Once u distribute you should have -3n-15=12 Now you want to add 15 to both sides to cancel it out ( because n has to be isolated) -3n=27 Now you want to divide by -3 to both sides to get n by itself n=-9

-3 (n+5) = 12

-3•n -3•5

-3n-15 = 12

-3n+15 = 12+15

-3n = 27

-3n/-3 = 27/-3

n = -9 or -9n

First you want to distribute, keep in mind you cannot add in the parentheses because they are NOT like terms.

Once u distribute you should have

-3n-15=12

Now you want to add 15 to both sides to cancel it out ( because n has to be isolated)

-3n=27

Now you want to divide by -3 to both sides to get n by itself

n=-9