x-9=12+11x

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Solution for x-9=12+11x equation: 



x-9=12+11x

We move all terms to the left:

x-9-(12+11x)=0

We add all the numbers together, and all the variables

x-(11x+12)-9=0

We get rid of parentheses

x-11x-12-9=0

We add all the numbers together, and all the variables

-10x-21=0

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

-10x=21

x=21/-10

x=-2+1/10

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