129=6x-12+3x-9

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Solution for 129=6x-12+3x-9 equation: 



129=6x-12+3x-9

We move all terms to the left:

129-(6x-12+3x-9)=0

We add all the numbers together, and all the variables

-(9x-21)+129=0

We get rid of parentheses

-9x+21+129=0

We add all the numbers together, and all the variables

-9x+150=0

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

-9x=-150

x=-150/-9

x=16+2/3

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