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2.7b+2.9=1.01
We move all terms to the left:
2.7b+2.9-(1.01)=0
We add all the numbers together, and all the variables
2.7b+1.89=0
We move all terms containing b to the left, all other terms to the right
2.7b=-1.89
b=-1.89/2.7
b=-1/1.4285714285714
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