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3-x=-(x-3)
We simplify the equation to the form, which is simple to understand
3-x=-(x-3)
Remove unnecessary parentheses
3-x=-1x+3
We move all terms containing x to the left and all other terms to the right.
-1x+1x=+3-3
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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