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-7(n-3)=21+2n
We simplify the equation to the form, which is simple to understand
-7(n-3)=21+2n
Reorder the terms in parentheses
+(-7n+21)=21+2n
Remove unnecessary parentheses
-7n+21=+21+2n
We move all terms containing n to the left and all other terms to the right.
-7n-2n=+21-21
We simplify left and right side of the equation.
-9n=0
We divide both sides of the equation by -9 to get n.
n=-0
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