4x-12=21-2x

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



4x-12=21-2x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

4x+2x-21-12=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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