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(2n+-4)5=-40
We move all terms to the left:
(2n+-4)5-(-40)=0
We add all the numbers together, and all the variables
(2n-4)5-(-40)=0
We add all the numbers together, and all the variables
(2n-4)5+40=0
We multiply parentheses
10n-20+40=0
We add all the numbers together, and all the variables
10n+20=0
We move all terms containing n to the left, all other terms to the right
10n=-20
n=-20/10
n=-2
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