4-2x=21x+12

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Solution for 4-2x=21x+12 equation: 



4-2x=21x+12

We move all terms to the left:

4-2x-(21x+12)=0

We get rid of parentheses

-2x-21x-12+4=0

We add all the numbers together, and all the variables

-23x-8=0

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

-23x=8

x=8/-23

x=-8/23

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