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-1-7k=8k+7-7k
We move all terms to the left:
-1-7k-(8k+7-7k)=0
We add all the numbers together, and all the variables
-7k-(k+7)-1=0
We get rid of parentheses
-7k-k-7-1=0
We add all the numbers together, and all the variables
-8k-8=0
We move all terms containing k to the left, all other terms to the right
-8k=8
k=8/-8
k=-1
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