6x-9=11x+21

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Solution for 6x-9=11x+21 equation: 



6x-9=11x+21

We move all terms to the left:

6x-9-(11x+21)=0

We get rid of parentheses

6x-11x-21-9=0

We add all the numbers together, and all the variables

-5x-30=0

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

-5x=30

x=30/-5

x=-6

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