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20=3b-2
We move all terms to the left:
20-(3b-2)=0
We get rid of parentheses
-3b+2+20=0
We add all the numbers together, and all the variables
-3b+22=0
We move all terms containing b to the left, all other terms to the right
-3b=-22
b=-22/-3
b=7+1/3
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