9x-39=-4x

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Solution for 9x-39=-4x equation: 



9x-39=-4x

We move all terms to the left:

9x-39-(-4x)=0

We get rid of parentheses

9x+4x-39=0

We add all the numbers together, and all the variables

13x-39=0

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

13x=39

x=39/13

x=3

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