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12n+5n=17
We simplify the equation to the form, which is simple to understand
12n+5n=17
We move all terms containing n to the left and all other terms to the right.
+12n+5n=+17
We simplify left and right side of the equation.
+17n=+17
We divide both sides of the equation by 17 to get n.
n=1
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