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83=9b-20
We move all terms to the left:
83-(9b-20)=0
We get rid of parentheses
-9b+20+83=0
We add all the numbers together, and all the variables
-9b+103=0
We move all terms containing b to the left, all other terms to the right
-9b=-103
b=-103/-9
b=11+4/9
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