257=6(7-7x)-x

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Solution for 257=6(7-7x)-x equation: 



257=6(7-7x)-x

We move all terms to the left:

257-(6(7-7x)-x)=0

We add all the numbers together, and all the variables

-(6(-7x+7)-x)+257=0



We calculate terms in parentheses: -(6(-7x+7)-x), so:

6(-7x+7)-x

We add all the numbers together, and all the variables

-1x+6(-7x+7)

We multiply parentheses

-1x-42x+42

We add all the numbers together, and all the variables

-43x+42

Back to the equation:

-(-43x+42)



We get rid of parentheses

43x-42+257=0

We add all the numbers together, and all the variables

43x+215=0

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

43x=-215

x=-215/43

x=-5

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