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3=9b+8
We move all terms to the left:
3-(9b+8)=0
We get rid of parentheses
-9b-8+3=0
We add all the numbers together, and all the variables
-9b-5=0
We move all terms containing b to the left, all other terms to the right
-9b=5
b=5/-9
b=-5/9
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