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-2(-1)(-7)(7)=0
We simplify the equation to the form, which is simple to understand
-2(-1)*(-7)*(7)=0
Reorder the terms in parentheses
multiplication of parentheses
-2*(+7)*(7)=0
Reorder the terms in parentheses
multiplication of parentheses
-2*(+49)=0
Reorder the terms in parentheses
+(-98)=0
Remove unnecessary parentheses
-98=0
We move all terms containing to the left and all other terms to the right.
0=0+98
We simplify left and right side of the equation.
0=+98
0=98
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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