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11=8k+9k
We move all terms to the left:
11-(8k+9k)=0
We add all the numbers together, and all the variables
-(+17k)+11=0
We get rid of parentheses
-17k+11=0
We move all terms containing k to the left, all other terms to the right
-17k=-11
k=-11/-17
k=11/17
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