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-n+15+4n+15=-3
We simplify the equation to the form, which is simple to understand
-n+15+4n+15=-3
We move all terms containing n to the left and all other terms to the right.
-1n+4n=-3-15-15
We simplify left and right side of the equation.
+3n=-33
We divide both sides of the equation by 3 to get n.
n=-11
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