n=12+[n-1][3]

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Solution for n=12+[n-1][3] equation:


Simplifying
n = 12 + [n + -1][3]

Reorder the terms:
n = 12 + [-1 + n][3]

Reorder the terms for easier multiplication:
n = 12 + 3[-1 + n]
n = 12 + [-1 * 3 + n * 3]
n = 12 + [-3 + 3n]

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

Solving
n = 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.
n + -3n = 9 + 3n + -3n

Combine like terms: n + -3n = -2n
-2n = 9 + 3n + -3n

Combine like terms: 3n + -3n = 0
-2n = 9 + 0
-2n = 9

Divide each side by '-2'.
n = -4.5

Simplifying
n = -4.5

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