-8+2x=21x+12

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



-8+2x=21x+12

We move all terms to the left:

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

We get rid of parentheses

2x-21x-12-8=0

We add all the numbers together, and all the variables

-19x-20=0

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

-19x=20

x=20/-19

x=-1+1/19

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