90=9+9i

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Solution for 90=9+9i equation: 



90=9+9i

We move all terms to the left:

90-(9+9i)=0

We add all the numbers together, and all the variables

-(9i+9)+90=0

We get rid of parentheses

-9i-9+90=0

We add all the numbers together, and all the variables

-9i+81=0

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

-9i=-81

i=-81/-9

i=+9

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