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408=-8(5-8n)
We move all terms to the left:
408-(-8(5-8n))=0
We add all the numbers together, and all the variables
-(-8(-8n+5))+408=0
We calculate terms in parentheses: -(-8(-8n+5)), so:We get rid of parentheses
-8(-8n+5)
We multiply parentheses
64n-40
Back to the equation:
-(64n-40)
-64n+40+408=0
We add all the numbers together, and all the variables
-64n+448=0
We move all terms containing n to the left, all other terms to the right
-64n=-448
n=-448/-64
n=+7
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