[k+9]=4

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Solution for [k+9]=4 equation: 


Simplifying
[k + 9] = 4

Reorder the terms:
[9 + k] = 4

Remove brackets around [9 + k]
9 + k = 4

Solving
9 + k = 4

Solving for variable 'k'.

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

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

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

Combine like terms: 4 + -9 = -5
k = -5

Simplifying
k = -5

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