-91=7(-3x-4)

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Solution for -91=7(-3x-4) equation: 



-91=7(-3x-4)

We move all terms to the left:

-91-(7(-3x-4))=0



We calculate terms in parentheses: -(7(-3x-4)), so:

7(-3x-4)

We multiply parentheses

-21x-28

Back to the equation:

-(-21x-28)



We get rid of parentheses

21x+28-91=0

We add all the numbers together, and all the variables

21x-63=0

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

21x=63

x=63/21

x=3

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