-3x=9.

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Solution for -3x=9. equation: 



-3x=9.

We move all terms to the left:

-3x-(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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