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5(n+3)+4n=0
We simplify the equation to the form, which is simple to understand
5(n+3)+4n=0
Reorder the terms in parentheses
+(+5n+15)+4n=0
Remove unnecessary parentheses
+5n+15+4n=0
We move all terms containing n to the left and all other terms to the right.
+5n+4n=0-15
We simplify left and right side of the equation.
+9n=-15
We divide both sides of the equation by 9 to get n.
n=-1.66666666667
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