7x-9x=-x

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Solution for 7x-9x=-x equation: 



7x-9x=-x

We move all terms to the left:

7x-9x-(-x)=0

We add all the numbers together, and all the variables

7x-9x-(-1x)=0

We add all the numbers together, and all the variables

-2x-(-1x)=0

We get rid of parentheses

-2x+1x=0

We add all the numbers together, and all the variables

-x=0

x=0/-1

x=0

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