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-4(-3x+7)=-64
We simplify the equation to the form, which is simple to understand
-4(-3x+7)=-64
Reorder the terms in parentheses
+(+12x-28)=-64
Remove unnecessary parentheses
+12x-28=-64
We move all terms containing x to the left and all other terms to the right.
+12x=-64+28
We simplify left and right side of the equation.
+12x=-36
We divide both sides of the equation by 12 to get x.
x=-3
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