21-9x=(-6)

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



21-9x=(-6)

We move all terms to the left:

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

We add all the numbers together, and all the variables

-9x+27=0

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

-9x=-27

x=-27/-9

x=+3

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