7-7b=77

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Solution for 7-7b=77 equation: 



7-7b=77

We move all terms to the left:

7-7b-(77)=0

We add all the numbers together, and all the variables

-7b-70=0

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

-7b=70

b=70/-7

b=-10

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