9x+3x=+4x

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Solution for 9x+3x=+4x equation: 



9x+3x=+4x

We move all terms to the left:

9x+3x-(+4x)=0

We add all the numbers together, and all the variables

12x-(+4x)=0

We get rid of parentheses

12x-4x=0

We add all the numbers together, and all the variables

8x=0

x=0/8

x=0

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