3x+4x=x-2x

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Solution for 3x+4x=x-2x equation: 



3x+4x=x-2x

We move all terms to the left:

3x+4x-(x-2x)=0

We add all the numbers together, and all the variables

3x+4x-(-1x)=0

We add all the numbers together, and all the variables

7x-(-1x)=0

We get rid of parentheses

7x+1x=0

We add all the numbers together, and all the variables

8x=0

x=0/8

x=0

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