-7(8b-4)=420

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Solution for -7(8b-4)=420 equation: 



-7(8b-4)=420

We move all terms to the left:

-7(8b-4)-(420)=0

We multiply parentheses

-56b+28-420=0

We add all the numbers together, and all the variables

-56b-392=0

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

-56b=392

b=392/-56

b=-7

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