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12(2)+9(2)=0
We simplify the equation to the form, which is simple to understand
12(2)+9(2)=0
Reorder the terms in parentheses
+(+24)+9*(2)=0
Remove unnecessary parentheses
+24+9+*(+2+)=0
Reorder the terms in parentheses
+24+(+18)=0
Remove unnecessary parentheses
+24+18=0
We move all terms containing to the left and all other terms to the right.
0=0-24-18
We simplify left and right side of the equation.
0=-42
0=-42
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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