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(8+4i)+(12-i)=0
We add all the numbers together, and all the variables
(4i+8)+(-1i+12)=0
We get rid of parentheses
4i-1i+8+12=0
We add all the numbers together, and all the variables
3i+20=0
We move all terms containing i to the left, all other terms to the right
3i=-20
i=-20/3
i=-6+2/3
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