-398=8(8b-7)-7b

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Solution for -398=8(8b-7)-7b equation: 



-398=8(8b-7)-7b

We move all terms to the left:

-398-(8(8b-7)-7b)=0



We calculate terms in parentheses: -(8(8b-7)-7b), so:

8(8b-7)-7b

We add all the numbers together, and all the variables

-7b+8(8b-7)

We multiply parentheses

-7b+64b-56

We add all the numbers together, and all the variables

57b-56

Back to the equation:

-(57b-56)



We get rid of parentheses

-57b+56-398=0

We add all the numbers together, and all the variables

-57b-342=0

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

-57b=342

b=342/-57

b=-6

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