x=9+4x

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Solution for x=9+4x equation: 



x=9+4x

We move all terms to the left:

x-(9+4x)=0

We add all the numbers together, and all the variables

x-(4x+9)=0

We get rid of parentheses

x-4x-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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