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(12+8i)-(-3-10i)=0
We simplify the equation to the form, which is simple to understand
(12+8i)-(-3-10i)=0
Remove unnecessary parentheses
12+8i-(-3-10i)=0
Remove unnecessary parentheses
12+8i+3+10i=0
We move all terms containing i to the left and all other terms to the right.
+8i+10i=0-12-3
We simplify left and right side of the equation.
+18i=-15
We divide both sides of the equation by 18 to get i.
i=-0.833333333333
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