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331=6+7b
We move all terms to the left:
331-(6+7b)=0
We add all the numbers together, and all the variables
-(7b+6)+331=0
We get rid of parentheses
-7b-6+331=0
We add all the numbers together, and all the variables
-7b+325=0
We move all terms containing b to the left, all other terms to the right
-7b=-325
b=-325/-7
b=46+3/7
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