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.2+-3k=-6.4
We move all terms to the left:
.2+-3k-(-6.4)=0
We add all the numbers together, and all the variables
-3k+6.6=0
We move all terms containing k to the left, all other terms to the right
-3k=-6.6
k=-6.6/-3
k=2+0.6/3
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