3x+9x=9x/(-7x)

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Solution for 3x+9x=9x/(-7x) equation: 



3x+9x=9x/(-7x)

We move all terms to the left:

3x+9x-(9x/(-7x))=0



Domain of the equation: (-7x))!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

12x-(9x/(-7x))=0

We multiply all the terms by the denominator


12x*(-7x))-(9x=0

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