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12-9x=3x+12
We simplify the equation to the form, which is simple to understand
12-9x=3x+12
We move all terms containing x to the left and all other terms to the right.
-9x-3x=+12-12
We simplify left and right side of the equation.
-12x=0
We divide both sides of the equation by -12 to get x.
x=-0
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