6x-9-3x=21+2x-12

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Solution for 6x-9-3x=21+2x-12 equation: 



6x-9-3x=21+2x-12

We move all terms to the left:

6x-9-3x-(21+2x-12)=0

We add all the numbers together, and all the variables

6x-3x-(2x+9)-9=0

We add all the numbers together, and all the variables

3x-(2x+9)-9=0

We get rid of parentheses

3x-2x-9-9=0

We add all the numbers together, and all the variables

x-18=0

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

x=18

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