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2b+2b=2.8
We move all terms to the left:
2b+2b-(2.8)=0
We add all the numbers together, and all the variables
4b-2.8=0
We move all terms containing b to the left, all other terms to the right
4b=2.8
b=2.8/4
b=1/1.4285714285714
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