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n-4-4n=-13
We simplify the equation to the form, which is simple to understand
n-4-4n=-13
We move all terms containing n to the left and all other terms to the right.
+1n-4n=-13+4
We simplify left and right side of the equation.
-3n=-9
We divide both sides of the equation by -3 to get n.
n=3
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