-x-2x+7=3x+7

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Solution for -x-2x+7=3x+7 equation: 



-x-2x+7=3x+7

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-3x-3x-7+7=0

We add all the numbers together, and all the variables

-6x=0

x=0/-6

x=0

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