-3(n+8)=-21

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Solution for -3(n+8)=-21 equation: 


Simplifying
-3(n + 8) = -21

Reorder the terms:
-3(8 + n) = -21
(8 * -3 + n * -3) = -21
(-24 + -3n) = -21

Solving
-24 + -3n = -21

Solving for variable 'n'.

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

Add '24' to each side of the equation.
-24 + 24 + -3n = -21 + 24

Combine like terms: -24 + 24 = 0
0 + -3n = -21 + 24
-3n = -21 + 24

Combine like terms: -21 + 24 = 3
-3n = 3

Divide each side by '-3'.
n = -1

Simplifying
n = -1

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