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-(3x+1)=-13
We simplify the equation to the form, which is simple to understand
-(3x+1)=-13
Remove unnecessary parentheses
-3x-1=-13
We move all terms containing x to the left and all other terms to the right.
-3x=-13+1
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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