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-4+3.K=7.8
We move all terms to the left:
-4+3.K-(7.8)=0
We add all the numbers together, and all the variables
3.K-11.8=0
We move all terms containing K to the left, all other terms to the right
3.K=11.8
K=11.8/3.
K=3+2.8/3.
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