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12+4n=-4(n-5)
We move all terms to the left:
12+4n-(-4(n-5))=0
We calculate terms in parentheses: -(-4(n-5)), so:We get rid of parentheses
-4(n-5)
We multiply parentheses
-4n+20
Back to the equation:
-(-4n+20)
4n+4n-20+12=0
We add all the numbers together, and all the variables
8n-8=0
We move all terms containing n to the left, all other terms to the right
8n=8
n=8/8
n=1
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