3x+7-4x=7-x

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



3x+7-4x=7-x

We move all terms to the left:

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

We add all the numbers together, and all the variables

3x-4x-(-1x+7)+7=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1x+1x-7+7=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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