13i-15i+3=21

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Solution for 13i-15i+3=21 equation: 



13i-15i+3=21

We move all terms to the left:

13i-15i+3-(21)=0

We add all the numbers together, and all the variables

-2i-18=0

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

-2i=18

i=18/-2

i=-9

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