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100=98b+02b-b
We move all terms to the left:
100-(98b+02b-b)=0
We add all the numbers together, and all the variables
-(+99b)+100=0
We get rid of parentheses
-99b+100=0
We move all terms containing b to the left, all other terms to the right
-99b=-100
b=-100/-99
b=1+1/99
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