3(-2-3n)-3n=-42

Solution for 3(-2-3n)-3n=-42 equation:

Simplifying
3(-2 + -3n) + -3n = -42
(-2 * 3 + -3n * 3) + -3n = -42
(-6 + -9n) + -3n = -42

Combine like terms: -9n + -3n = -12n
-6 + -12n = -42

Solving
-6 + -12n = -42

Solving for variable 'n'.

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

Add '6' to each side of the equation.
-6 + 6 + -12n = -42 + 6

Combine like terms: -6 + 6 = 0
0 + -12n = -42 + 6
-12n = -42 + 6

Combine like terms: -42 + 6 = -36
-12n = -36

Divide each side by '-12'.
n = 3

Simplifying
n = 3