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-4k+3.4=7.8
We move all terms to the left:
-4k+3.4-(7.8)=0
We add all the numbers together, and all the variables
-4k-4.4=0
We move all terms containing k to the left, all other terms to the right
-4k=4.4
k=4.4/-4
k=-1+0.4/4
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