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(3+6n)=30-n
We simplify the equation to the form, which is simple to understand
(3+6n)=30-n
Remove unnecessary parentheses
3+6n=30-n
We move all terms containing n to the left and all other terms to the right.
+6n+1n=+30-3
We simplify left and right side of the equation.
+7n=+27
We divide both sides of the equation by 7 to get n.
n=3.85714285714
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