12x=3x+(-9)

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Solution for 12x=3x+(-9) equation: 


Simplifying
12x = 3x + (-9)
12x = 3x + -9

Reorder the terms:
12x = -9 + 3x

Solving
12x = -9 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
12x + -3x = -9 + 3x + -3x

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

Combine like terms: 3x + -3x = 0
9x = -9 + 0
9x = -9

Divide each side by '9'.
x = -1

Simplifying
x = -1

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