9=18+3x

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Solution for 9=18+3x equation: 



9=18+3x

We move all terms to the left:

9-(18+3x)=0

We add all the numbers together, and all the variables

-(3x+18)+9=0

We get rid of parentheses

-3x-18+9=0

We add all the numbers together, and all the variables

-3x-9=0

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

-3x=9

x=9/-3

x=-3

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