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3x-(x-4)=-12
We simplify the equation to the form, which is simple to understand
3x-(x-4)=-12
Remove unnecessary parentheses
3x-1x+4=-12
We move all terms containing x to the left and all other terms to the right.
+3x-1x=-12-4
We simplify left and right side of the equation.
+2x=-16
We divide both sides of the equation by 2 to get x.
x=-8
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