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2+1-4b-7b=-7+4+7
We move all terms to the left:
2+1-4b-7b-(-7+4+7)=0
We add all the numbers together, and all the variables
-4b-7b+2+1-4=0
We add all the numbers together, and all the variables
-11b-1=0
We move all terms containing b to the left, all other terms to the right
-11b=1
b=1/-11
b=-1/11
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