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6.8-4.2b=5.6
We move all terms to the left:
6.8-4.2b-(5.6)=0
We add all the numbers together, and all the variables
-4.2b+1.2=0
We move all terms containing b to the left, all other terms to the right
-4.2b=-1.2
b=-1.2/-4.2
b=1/3.5
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