21-(x+9)=5x-6

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Solution for 21-(x+9)=5x-6 equation: 



21-(x+9)=5x-6

We move all terms to the left:

21-(x+9)-(5x-6)=0

We get rid of parentheses

-x-5x-9+6+21=0

We add all the numbers together, and all the variables

-6x+18=0

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

-6x=-18

x=-18/-6

x=+3

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