3x=x-9+4=31

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Solution for 3x=x-9+4=31 equation: 



3x=x-9+4=31

We move all terms to the left:

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

We add all the numbers together, and all the variables

3x-(x-5)=0

We get rid of parentheses

3x-x+5=0

We add all the numbers together, and all the variables

2x+5=0

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

2x=-5

x=-5/2

x=-2+1/2

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