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8b=7b-4-6b
We move all terms to the left:
8b-(7b-4-6b)=0
We add all the numbers together, and all the variables
8b-(b-4)=0
We get rid of parentheses
8b-b+4=0
We add all the numbers together, and all the variables
7b+4=0
We move all terms containing b to the left, all other terms to the right
7b=-4
b=-4/7
b=-4/7
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