-21=3(n+3)

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


Simplifying
-21 = 3(n + 3)

Reorder the terms:
-21 = 3(3 + n)
-21 = (3 * 3 + n * 3)
-21 = (9 + 3n)

Solving
-21 = 9 + 3n

Solving for variable 'n'.

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

Add '-3n' to each side of the equation.
-21 + -3n = 9 + 3n + -3n

Combine like terms: 3n + -3n = 0
-21 + -3n = 9 + 0
-21 + -3n = 9

Add '21' to each side of the equation.
-21 + 21 + -3n = 9 + 21

Combine like terms: -21 + 21 = 0
0 + -3n = 9 + 21
-3n = 9 + 21

Combine like terms: 9 + 21 = 30
-3n = 30

Divide each side by '-3'.
n = -10

Simplifying
n = -10

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