SOLUTION: 12i+18=9i
Algebra.Com
Question 169068:  12i+18=9i 
Answer by nerdybill(7384)   (Show Source): You can put this solution on YOUR website!
 To solve for 'i', isolate the unknown to one side of the equation:
12i+18=9i
Subtracting 9i from both sides:
3i+18=0
Subtracting 18 from both sides:
3i = -18
Dividing both sides by 3:
i = -6
 
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