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192=-4(1+7n)
We move all terms to the left:
192-(-4(1+7n))=0
We add all the numbers together, and all the variables
-(-4(7n+1))+192=0
We calculate terms in parentheses: -(-4(7n+1)), so:We get rid of parentheses
-4(7n+1)
We multiply parentheses
-28n-4
Back to the equation:
-(-28n-4)
28n+4+192=0
We add all the numbers together, and all the variables
28n+196=0
We move all terms containing n to the left, all other terms to the right
28n=-196
n=-196/28
n=-7
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