-x-21=17-3x

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Solution for -x-21=17-3x equation: 



-x-21=17-3x

We move all terms to the left:

-x-21-(17-3x)=0

We add all the numbers together, and all the variables

-x-(-3x+17)-21=0

We add all the numbers together, and all the variables

-1x-(-3x+17)-21=0

We get rid of parentheses

-1x+3x-17-21=0

We add all the numbers together, and all the variables

2x-38=0

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

2x=38

x=38/2

x=19

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