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3n+9=7n+7
We simplify the equation to the form, which is simple to understand
3n+9=7n+7
We move all terms containing n to the left and all other terms to the right.
+3n-7n=+7-9
We simplify left and right side of the equation.
-4n=-2
We divide both sides of the equation by -4 to get n.
n=0.5
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