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b-1.3=7b
We move all terms to the left:
b-1.3-(7b)=0
We add all the numbers together, and all the variables
-6b-1.3=0
We move all terms containing b to the left, all other terms to the right
-6b=1.3
b=1.3/-6
b=-1/4.6153846153846
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