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-4+6x-6x-12=-4
We simplify the equation to the form, which is simple to understand
-4+6x-6x-12=-4
We move all terms containing x to the left and all other terms to the right.
+6x-6x=-4+4+12
We simplify left and right side of the equation.
0x=+12
0=12
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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