-x*9=21

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Solution for -x*9=21 equation: 



-x*9=21

We move all terms to the left:

-x*9-(21)=0

Wy multiply elements

-9x-21=0

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

-9x=21

x=21/-9

x=-2+1/3

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