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-85=k+(-4)
We move all terms to the left:
-85-(k+(-4))=0
We calculate terms in parentheses: -(k+(-4)), so:We get rid of parentheses
k+(-4)
We add all the numbers together, and all the variables
k-4
Back to the equation:
-(k-4)
-k+4-85=0
We add all the numbers together, and all the variables
-1k-81=0
We move all terms containing k to the left, all other terms to the right
-k=81
k=81/-1
k=-81
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