(18+11i)+(-20-11i)=

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Solution for (18+11i)+(-20-11i)= equation:


(18+11i)+(-20-11i)=0

We simplify the equation to the form, which is simple to understand 
(18+11i)+(-20-11i)=0

Remove unnecessary parentheses
18+11i+(-20-11i)=0

Remove unnecessary parentheses
+18+11i-20-11i=0

We move all terms containing i to the left and all other terms to the right. 
+11i-11i=0-18+20

We simplify left and right side of the equation. 
i=+2

0=2

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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