18=i*9

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Solution for 18=i*9 equation: 



18=i*9

We move all terms to the left:

18-(i*9)=0

We add all the numbers together, and all the variables

-(+i*9)+18=0

We get rid of parentheses

-i*9+18=0

Wy multiply elements

-9i+18=0

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

-9i=-18

i=-18/-9

i=+2

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