12x-135=6x-9

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Solution for 12x-135=6x-9 equation: 



12x-135=6x-9

We move all terms to the left:

12x-135-(6x-9)=0

We get rid of parentheses

12x-6x+9-135=0

We add all the numbers together, and all the variables

6x-126=0

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

6x=126

x=126/6

x=21

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