9=x-4x-9

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Solution for 9=x-4x-9 equation: 



9=x-4x-9

We move all terms to the left:

9-(x-4x-9)=0

We add all the numbers together, and all the variables

-(-3x-9)+9=0

We get rid of parentheses

3x+9+9=0

We add all the numbers together, and all the variables

3x+18=0

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

3x=-18

x=-18/3

x=-6

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