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(4+x)3=0
We simplify the equation to the form, which is simple to understand
(4+x)3=0
Reorder the terms in parentheses
(+12+3x)=0
Remove unnecessary parentheses
+12+3x=0
We move all terms containing x to the left and all other terms to the right.
+3x=0-12
We simplify left and right side of the equation.
+3x=-12
We divide both sides of the equation by 3 to get x.
x=-4
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