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4+(-4)=0
We simplify the equation to the form, which is simple to understand
4+(-4)=0
Remove unnecessary parentheses
+4-4=0
We move all terms containing to the left and all other terms to the right.
0=0-4+4
We simplify left and right side of the equation.
0=0
0=0
This equation is an identity, so all real numbers are solutions.
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