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12x-9+x-4=4x-2x+9
We simplify the equation to the form, which is simple to understand
12x-9+x-4=4x-2x+9
We move all terms containing x to the left and all other terms to the right.
+12x+1x-4x+2x=+9+9+4
We simplify left and right side of the equation.
+11x=+22
We divide both sides of the equation by 11 to get x.
x=2
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