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2-(-4)=4-4
We simplify the equation to the form, which is simple to understand
2-(-4)=4-4
Remove unnecessary parentheses
2+4=4-4
We move all terms containing to the left and all other terms to the right.
0=+4-4-2-4
We simplify left and right side of the equation.
0=-6
0=-6
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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