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30-4b=3+b
We move all terms to the left:
30-4b-(3+b)=0
We add all the numbers together, and all the variables
-4b-(b+3)+30=0
We get rid of parentheses
-4b-b-3+30=0
We add all the numbers together, and all the variables
-5b+27=0
We move all terms containing b to the left, all other terms to the right
-5b=-27
b=-27/-5
b=5+2/5
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