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-12+4(3)=15-4(3)
We simplify the equation to the form, which is simple to understand
-12+4(3)=15-4(3)
Reorder the terms in parentheses
-12+(+12)=15-4*(3)
Remove unnecessary parentheses
-12+12=+15-4+*(+3+)
Reorder the terms in parentheses
-12+12=15+(-12)
Remove unnecessary parentheses
-12+12=+15-12
We move all terms containing to the left and all other terms to the right.
0=+15-12+12-12
We simplify left and right side of the equation.
0=+3
0=3
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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