-21=-3+8x

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Solution for -21=-3+8x equation: 



-21=-3+8x

We move all terms to the left:

-21-(-3+8x)=0

We add all the numbers together, and all the variables

-(8x-3)-21=0

We get rid of parentheses

-8x+3-21=0

We add all the numbers together, and all the variables

-8x-18=0

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

-8x=18

x=18/-8

x=-2+1/4

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