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11i+(-7-15i)=0
We add all the numbers together, and all the variables
11i+(-15i-7)=0
We get rid of parentheses
11i-15i-7=0
We add all the numbers together, and all the variables
-4i-7=0
We move all terms containing i to the left, all other terms to the right
-4i=7
i=7/-4
i=-1+3/4
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