105=3(-6n-7)

Solution for 105=3(-6n-7) equation:

Simplifying
105 = 3(-6n + -7)

Reorder the terms:
105 = 3(-7 + -6n)
105 = (-7 * 3 + -6n * 3)
105 = (-21 + -18n)

Solving
105 = -21 + -18n

Solving for variable 'n'.

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

Add '18n' to each side of the equation.
105 + 18n = -21 + -18n + 18n

Combine like terms: -18n + 18n = 0
105 + 18n = -21 + 0
105 + 18n = -21

Add '-105' to each side of the equation.
105 + -105 + 18n = -21 + -105

Combine like terms: 105 + -105 = 0
0 + 18n = -21 + -105
18n = -21 + -105

Combine like terms: -21 + -105 = -126
18n = -126

Divide each side by '18'.
n = -7

Simplifying
n = -7