3x+4=3x-4x

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



3x+4=3x-4x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

3x+1x+4=0

We add all the numbers together, and all the variables

4x+4=0

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

4x=-4

x=-4/4

x=-1

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