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3=i/2+4
We move all terms to the left:
3-(i/2+4)=0
We get rid of parentheses
-i/2-4+3=0
We multiply all the terms by the denominator
-i-4*2+3*2=0
We add all the numbers together, and all the variables
-1i-2=0
We move all terms containing i to the left, all other terms to the right
-i=2
i=2/-1
i=-2
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