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-142=n+(n+1)+(n+2)
We move all terms to the left:
-142-(n+(n+1)+(n+2))=0
We calculate terms in parentheses: -(n+(n+1)+(n+2)), so:We get rid of parentheses
n+(n+1)+(n+2)
We get rid of parentheses
n+n+n+1+2
We add all the numbers together, and all the variables
3n+3
Back to the equation:
-(3n+3)
-3n-3-142=0
We add all the numbers together, and all the variables
-3n-145=0
We move all terms containing n to the left, all other terms to the right
-3n=145
n=145/-3
n=-48+1/3
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