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7+7n+5n=7
We simplify the equation to the form, which is simple to understand
7+7n+5n=7
We move all terms containing n to the left and all other terms to the right.
+7n+5n=+7-7
We simplify left and right side of the equation.
+12n=0
We divide both sides of the equation by 12 to get n.
n=0
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