3x+3=21+6x

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Solution for 3x+3=21+6x equation: 



3x+3=21+6x

We move all terms to the left:

3x+3-(21+6x)=0

We add all the numbers together, and all the variables

3x-(6x+21)+3=0

We get rid of parentheses

3x-6x-21+3=0

We add all the numbers together, and all the variables

-3x-18=0

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

-3x=18

x=18/-3

x=-6

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