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n-7+2n=-7
We simplify the equation to the form, which is simple to understand
n-7+2n=-7
We move all terms containing n to the left and all other terms to the right.
+1n+2n=-7+7
We simplify left and right side of the equation.
+3n=0
We divide both sides of the equation by 3 to get n.
n=0
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