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48=-8+7b
We move all terms to the left:
48-(-8+7b)=0
We add all the numbers together, and all the variables
-(7b-8)+48=0
We get rid of parentheses
-7b+8+48=0
We add all the numbers together, and all the variables
-7b+56=0
We move all terms containing b to the left, all other terms to the right
-7b=-56
b=-56/-7
b=+8
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