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n-1=3n-15
We simplify the equation to the form, which is simple to understand
n-1=3n-15
We move all terms containing n to the left and all other terms to the right.
+1n-3n=-15+1
We simplify left and right side of the equation.
-2n=-14
We divide both sides of the equation by -2 to get n.
n=7
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