2x-21=8x+12

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Solution for 2x-21=8x+12 equation: 



2x-21=8x+12

We move all terms to the left:

2x-21-(8x+12)=0

We get rid of parentheses

2x-8x-12-21=0

We add all the numbers together, and all the variables

-6x-33=0

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

-6x=33

x=33/-6

x=-5+1/2

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