-217=7(-7b-3)

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Solution for -217=7(-7b-3) equation: 



-217=7(-7b-3)

We move all terms to the left:

-217-(7(-7b-3))=0



We calculate terms in parentheses: -(7(-7b-3)), so:

7(-7b-3)

We multiply parentheses

-49b-21

Back to the equation:

-(-49b-21)



We get rid of parentheses

49b+21-217=0

We add all the numbers together, and all the variables

49b-196=0

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

49b=196

b=196/49

b=4

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