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-6n-20=-2n-4(3n-1)
We move all terms to the left:
-6n-20-(-2n-4(3n-1))=0
We calculate terms in parentheses: -(-2n-4(3n-1)), so:We get rid of parentheses
-2n-4(3n-1)
We multiply parentheses
-2n-12n+4
We add all the numbers together, and all the variables
-14n+4
Back to the equation:
-(-14n+4)
-6n+14n-4-20=0
We add all the numbers together, and all the variables
8n-24=0
We move all terms containing n to the left, all other terms to the right
8n=24
n=24/8
n=3
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