3-3(2x+1)=x+21

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Solution for 3-3(2x+1)=x+21 equation: 



3-3(2x+1)=x+21

We move all terms to the left:

3-3(2x+1)-(x+21)=0

We multiply parentheses

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

-7x-21=0

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

-7x=21

x=21/-7

x=-3

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