6-9x-9=-21

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



6-9x-9=-21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-9x+18=0

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

-9x=-18

x=-18/-9

x=+2

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