3-1x=7+1x

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Solution for 3-1x=7+1x equation: 



3-1x=7+1x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1x-x-7+3=0

We add all the numbers together, and all the variables

-2x-4=0

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

-2x=4

x=4/-2

x=-2

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