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9n-13=5n+7
We simplify the equation to the form, which is simple to understand
9n-13=5n+7
We move all terms containing n to the left and all other terms to the right.
+9n-5n=+7+13
We simplify left and right side of the equation.
+4n=+20
We divide both sides of the equation by 4 to get n.
n=5
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