15=-3(x-3)+x

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



15=-3(x-3)+x

We move all terms to the left:

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



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

-3(x-3)+x

We add all the numbers together, and all the variables

x-3(x-3)

We multiply parentheses

x-3x+9

We add all the numbers together, and all the variables

-2x+9

Back to the equation:

-(-2x+9)



We get rid of parentheses

2x-9+15=0

We add all the numbers together, and all the variables

2x+6=0

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

2x=-6

x=-6/2

x=-3

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