[n-9]=4

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Solution for [n-9]=4 equation: 


Simplifying
[n + -9] = 4

Reorder the terms:
[-9 + n] = 4

Remove brackets around [-9 + n]
-9 + n = 4

Solving
-9 + n = 4

Solving for variable 'n'.

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

Add '9' to each side of the equation.
-9 + 9 + n = 4 + 9

Combine like terms: -9 + 9 = 0
0 + n = 4 + 9
n = 4 + 9

Combine like terms: 4 + 9 = 13
n = 13

Simplifying
n = 13

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