3x-(7-x)=4x+x

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Solution for 3x-(7-x)=4x+x equation: 



3x-(7-x)=4x+x

We move all terms to the left:

3x-(7-x)-(4x+x)=0

We add all the numbers together, and all the variables

3x-(-1x+7)-(+5x)=0

We get rid of parentheses

3x+1x-5x-7=0

We add all the numbers together, and all the variables

-1x-7=0

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

-x=7

x=7/-1

x=-7

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