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2.3b+7=-1
We move all terms to the left:
2.3b+7-(-1)=0
We add all the numbers together, and all the variables
2.3b+8=0
We move all terms containing b to the left, all other terms to the right
2.3b=-8
b=-8/2.3
b=-3+1/2.0909090909091
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