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-7-3n=-4n
We simplify the equation to the form, which is simple to understand
-7-3n=-4n
We move all terms containing n to the left and all other terms to the right.
-3n+4n=+7
We simplify left and right side of the equation.
+1n=+7
We divide both sides of the equation by 1 to get n.
n=7
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