-3x=x+9

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Solution for -3x=x+9 equation: 



-3x=x+9

We move all terms to the left:

-3x-(x+9)=0

We get rid of parentheses

-3x-x-9=0

We add all the numbers together, and all the variables

-4x-9=0

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

-4x=9

x=9/-4

x=-2+1/4

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