-15=3+9x

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Solution for -15=3+9x equation: 



-15=3+9x

We move all terms to the left:

-15-(3+9x)=0

We add all the numbers together, and all the variables

-(9x+3)-15=0

We get rid of parentheses

-9x-3-15=0

We add all the numbers together, and all the variables

-9x-18=0

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

-9x=18

x=18/-9

x=-2

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