X+5+4=12

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Solution for X+5+4=12 equation: 


Simplifying
X + 5 + 4 = 12

Reorder the terms:
5 + 4 + X = 12

Combine like terms: 5 + 4 = 9
9 + X = 12

Solving
9 + X = 12

Solving for variable 'X'.

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

Add '-9' to each side of the equation.
9 + -9 + X = 12 + -9

Combine like terms: 9 + -9 = 0
0 + X = 12 + -9
X = 12 + -9

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

Simplifying
X = 3

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