57=15+6(4-x)-3x

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Solution for 57=15+6(4-x)-3x equation: 



57=15+6(4-x)-3x

We move all terms to the left:

57-(15+6(4-x)-3x)=0

We add all the numbers together, and all the variables

-(15+6(-1x+4)-3x)+57=0



We calculate terms in parentheses: -(15+6(-1x+4)-3x), so:

15+6(-1x+4)-3x

determiningTheFunctionDomain
6(-1x+4)-3x+15

We add all the numbers together, and all the variables

-3x+6(-1x+4)+15

We multiply parentheses

-3x-6x+24+15

We add all the numbers together, and all the variables

-9x+39

Back to the equation:

-(-9x+39)



We get rid of parentheses

9x-39+57=0

We add all the numbers together, and all the variables

9x+18=0

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

9x=-18

x=-18/9

x=-2

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