11x-9=6x+21

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



11x-9=6x+21

We move all terms to the left:

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

We get rid of parentheses

11x-6x-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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