-90=78+4i

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Solution for -90=78+4i equation: 



-90=78+4i

We move all terms to the left:

-90-(78+4i)=0

We add all the numbers together, and all the variables

-(4i+78)-90=0

We get rid of parentheses

-4i-78-90=0

We add all the numbers together, and all the variables

-4i-168=0

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

-4i=168

i=168/-4

i=-42

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