3x+7-x=7+x-4

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



3x+7-x=7+x-4

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

2x-(x+3)+7=0

We get rid of parentheses

2x-x-3+7=0

We add all the numbers together, and all the variables

x+4=0

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

x=-4

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