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12=-2(-1+1n)
We simplify the equation to the form, which is simple to understand
12=-2(-1+1n)
Reorder the terms in parentheses
12=+(+2-2n)
Remove unnecessary parentheses
+12=+2-2n
We move all terms containing n to the left and all other terms to the right.
+2n=+2-12
We simplify left and right side of the equation.
+2n=-10
We divide both sides of the equation by 02 to get n.
n=-5
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