257-7b=12

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Solution for 257-7b=12 equation: 



257-7b=12

We move all terms to the left:

257-7b-(12)=0

We add all the numbers together, and all the variables

-7b+245=0

We move all terms containing b to the left, all other terms to the right

-7b=-245

b=-245/-7

b=+35

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