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1=-3(-1)-1
We simplify the equation to the form, which is simple to understand
1=-3(-1)-1
Reorder the terms in parentheses
1=+(+3)-1
Remove unnecessary parentheses
+1=+3-1
We move all terms containing to the left and all other terms to the right.
0=+3-1-1
We simplify left and right side of the equation.
0=+1
0=1
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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