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-3(4n+2)-3(1+6)=21
We simplify the equation to the form, which is simple to understand
-3(4n+2)-3(1+6)=21
Simplifying terms in parentheses
-3*(4n+2)-3*(+7)=21
Reorder the terms in parentheses
+(-12n-6)-3*(+7)=21
Remove unnecessary parentheses
-12n-6-3+*(+7+)=+21
Reorder the terms in parentheses
-12n-6+(-21)=21
Remove unnecessary parentheses
-12n-6-21=+21
We move all terms containing n to the left and all other terms to the right.
-12n=+21+6+21
We simplify left and right side of the equation.
-12n=+48
We divide both sides of the equation by -12 to get n.
n=-4
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