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-4(-1-3x)+4=80
We simplify the equation to the form, which is simple to understand
-4(-1-3x)+4=80
Reorder the terms in parentheses
+(+4+12x)+4=80
Remove unnecessary parentheses
+4+12x+4=+80
We move all terms containing x to the left and all other terms to the right.
+12x=+80-4-4
We simplify left and right side of the equation.
+12x=+72
We divide both sides of the equation by 12 to get x.
x=6
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