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(n+3)*2=18
We simplify the equation to the form, which is simple to understand
(n+3)*2=18
Reorder the terms in parentheses
(+2n+6)=18
Remove unnecessary parentheses
+2n+6=18
We move all terms containing n to the left and all other terms to the right.
+2n=+18-6
We simplify left and right side of the equation.
+2n=+12
We divide both sides of the equation by 2 to get n.
n=6
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