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12x-7=12x-7
We simplify the equation to the form, which is simple to understand
12x-7=12x-7
We move all terms containing x to the left and all other terms to the right.
+12x-12x=-7+7
We simplify left and right side of the equation.
0x=0
0=0
This equation is an identity, so all real numbers are solutions.
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