x=x-3+7(x+3)-3x-12

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Solution for x=x-3+7(x+3)-3x-12 equation: 



x=x-3+7(x+3)-3x-12

We move all terms to the left:

x-(x-3+7(x+3)-3x-12)=0



We calculate terms in parentheses: -(x-3+7(x+3)-3x-12), so:

x-3+7(x+3)-3x-12

determiningTheFunctionDomain
x+7(x+3)-3x-3-12

We add all the numbers together, and all the variables

-2x+7(x+3)-15

We multiply parentheses

-2x+7x+21-15

We add all the numbers together, and all the variables

5x+6

Back to the equation:

-(5x+6)



We get rid of parentheses

x-5x-6=0

We add all the numbers together, and all the variables

-4x-6=0

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

-4x=6

x=6/-4

x=-1+1/2

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