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3=b-4.23
We move all terms to the left:
3-(b-4.23)=0
We get rid of parentheses
-b+4.23+3=0
We add all the numbers together, and all the variables
-1b+7.23=0
We move all terms containing b to the left, all other terms to the right
-b=-7.23
b=-7.23/-1
b=7+0.23/1
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