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9-2n=n-3
We simplify the equation to the form, which is simple to understand
9-2n=n-3
We move all terms containing n to the left and all other terms to the right.
-2n-1n=-3-9
We simplify left and right side of the equation.
-3n=-12
We divide both sides of the equation by -3 to get n.
n=4
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