21-3x=3x-3

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



21-3x=3x-3

We move all terms to the left:

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

We get rid of parentheses

-3x-3x+3+21=0

We add all the numbers together, and all the variables

-6x+24=0

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

-6x=-24

x=-24/-6

x=+4

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