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-4b+30=2+3b
We move all terms to the left:
-4b+30-(2+3b)=0
We add all the numbers together, and all the variables
-4b-(3b+2)+30=0
We get rid of parentheses
-4b-3b-2+30=0
We add all the numbers together, and all the variables
-7b+28=0
We move all terms containing b to the left, all other terms to the right
-7b=-28
b=-28/-7
b=+4
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