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-3.4=0.4k
We move all terms to the left:
-3.4-(0.4k)=0
We add all the numbers together, and all the variables
-(+0.4k)-3.4=0
We get rid of parentheses
-0.4k-3.4=0
We move all terms containing k to the left, all other terms to the right
-0.4k=3.4
k=3.4/-0.4
k=-8+0.2/0.4
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