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1-2n-2n=-7-5n
We simplify the equation to the form, which is simple to understand
1-2n-2n=-7-5n
We move all terms containing n to the left and all other terms to the right.
-2n-2n+5n=-7-1
We simplify left and right side of the equation.
+1n=-8
We divide both sides of the equation by 1 to get n.
n=-8
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