-x-21=10-4x

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Solution for -x-21=10-4x equation: 



-x-21=10-4x

We move all terms to the left:

-x-21-(10-4x)=0

We add all the numbers together, and all the variables

-x-(-4x+10)-21=0

We add all the numbers together, and all the variables

-1x-(-4x+10)-21=0

We get rid of parentheses

-1x+4x-10-21=0

We add all the numbers together, and all the variables

3x-31=0

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

3x=31

x=31/3

x=10+1/3

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