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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

3x-(x+6)

We get rid of parentheses

3x-x-6

We add all the numbers together, and all the variables

2x-6

Back to the equation:

-(2x-6)



We get rid of parentheses

-1x-2x+6+15=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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