3x-(21-6x)=6

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Solution for 3x-(21-6x)=6 equation: 



3x-(21-6x)=6

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

3x+6x-21-6=0

We add all the numbers together, and all the variables

9x-27=0

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

9x=27

x=27/9

x=3

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