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solve for the valve of x and y. x + (x + y)i = 3 + 8i

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Hi Octavio;
x + (x + y)i = 3 + 8i
I am going to take a guess that the variables and constants connected to the imaginary number of i, are part of one group.  Whereas the x and 3, which are not connected to imaginary numbers, are part of the other group.
 
(x+y)i=8i
x+y=8
 
x=3
 
3+y=8
y=5