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3(x+7)=-x-3
We simplify the equation to the form, which is simple to understand
3(x+7)=-x-3
Reorder the terms in parentheses
+(+3x+21)=-x-3
Remove unnecessary parentheses
+3x+21=-x-3
We move all terms containing x to the left and all other terms to the right.
+3x+1x=-3-21
We simplify left and right side of the equation.
+4x=-24
We divide both sides of the equation by 4 to get x.
x=-6
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