3i+15=3

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Solution for 3i+15=3 equation: 



3i+15=3

We move all terms to the left:

3i+15-(3)=0

We add all the numbers together, and all the variables

3i+12=0

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

3i=-12

i=-12/3

i=-4

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