159=6x-3(-3x-7)

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Solution for 159=6x-3(-3x-7) equation: 



159=6x-3(-3x-7)

We move all terms to the left:

159-(6x-3(-3x-7))=0



We calculate terms in parentheses: -(6x-3(-3x-7)), so:

6x-3(-3x-7)

We multiply parentheses

6x+9x+21

We add all the numbers together, and all the variables

15x+21

Back to the equation:

-(15x+21)



We get rid of parentheses

-15x-21+159=0

We add all the numbers together, and all the variables

-15x+138=0

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

-15x=-138

x=-138/-15

x=9+1/5

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