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-4.2(-5.5)=0
We simplify the equation to the form, which is simple to understand
-4.2(-5.5)=0
Reorder the terms in parentheses
+(+23.1)=0
Remove unnecessary parentheses
+23.1=0
We move all terms containing to the left and all other terms to the right.
0=0-23.1
We simplify left and right side of the equation.
0=-23.1
0=-23.1
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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