18x-9=12+11x

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Solution for 18x-9=12+11x equation: 



18x-9=12+11x

We move all terms to the left:

18x-9-(12+11x)=0

We add all the numbers together, and all the variables

18x-(11x+12)-9=0

We get rid of parentheses

18x-11x-12-9=0

We add all the numbers together, and all the variables

7x-21=0

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

7x=21

x=21/7

x=3

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