-9x-21=-3

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Solution for -9x-21=-3 equation: 



-9x-21=-3

We move all terms to the left:

-9x-21-(-3)=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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