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-(-1+k)=7
We move all terms to the left:
-(-1+k)-(7)=0
We add all the numbers together, and all the variables
-(k-1)-7=0
We get rid of parentheses
-k+1-7=0
We add all the numbers together, and all the variables
-1k-6=0
We move all terms containing k to the left, all other terms to the right
-k=6
k=6/-1
k=-6
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