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(-4)-(-8)=0
We simplify the equation to the form, which is simple to understand
(-4)-(-8)=0
Remove unnecessary parentheses
-4-(-8)=0
Remove unnecessary parentheses
-4+8=0
We move all terms containing to the left and all other terms to the right.
0=0+4-8
We simplify left and right side of the equation.
0=-4
0=-4
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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