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1(x-12)=-(x+3)
We simplify the equation to the form, which is simple to understand
1(x-12)=-(x+3)
Reorder the terms in parentheses
+(+1x-12)=-(x+3)
Remove unnecessary parentheses
+1x-12=-(+x+3+)
Remove unnecessary parentheses
+1x-12=-1x-3
We move all terms containing x to the left and all other terms to the right.
+1x+1x=-3+12
We simplify left and right side of the equation.
+2x=+9
We divide both sides of the equation by 2 to get x.
x=4.5
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