[X-8]=4

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Solution for [X-8]=4 equation: 


Simplifying
[X + -8] = 4

Reorder the terms:
[-8 + X] = 4

Remove brackets around [-8 + X]
-8 + X = 4

Solving
-8 + X = 4

Solving for variable 'X'.

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

Add '8' to each side of the equation.
-8 + 8 + X = 4 + 8

Combine like terms: -8 + 8 = 0
0 + X = 4 + 8
X = 4 + 8

Combine like terms: 4 + 8 = 12
X = 12

Simplifying
X = 12

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