3x+4x=-9x

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



3x+4x=-9x

We move all terms to the left:

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

We add all the numbers together, and all the variables

7x-(-9x)=0

We get rid of parentheses

7x+9x=0

We add all the numbers together, and all the variables

16x=0

x=0/16

x=0

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