3x-21-6x=-x

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Solution for 3x-21-6x=-x equation: 



3x-21-6x=-x

We move all terms to the left:

3x-21-6x-(-x)=0

We add all the numbers together, and all the variables

3x-6x-(-1x)-21=0

We add all the numbers together, and all the variables

-3x-(-1x)-21=0

We get rid of parentheses

-3x+1x-21=0

We add all the numbers together, and all the variables

-2x-21=0

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

-2x=21

x=21/-2

x=-10+1/2

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