-123=-7x+4(-3x+12)

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Solution for -123=-7x+4(-3x+12) equation: 



-123=-7x+4(-3x+12)

We move all terms to the left:

-123-(-7x+4(-3x+12))=0



We calculate terms in parentheses: -(-7x+4(-3x+12)), so:

-7x+4(-3x+12)

We multiply parentheses

-7x-12x+48

We add all the numbers together, and all the variables

-19x+48

Back to the equation:

-(-19x+48)



We get rid of parentheses

19x-48-123=0

We add all the numbers together, and all the variables

19x-171=0

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

19x=171

x=171/19

x=9

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