(3-4i)(x+iy). Find the value of x and y

Dear Student, 
It seems that the question is incomplete, If we assume the Question to be 3-4i=x+iy, then we can say that x=3, and y=-4 as the two complex numbers are equal only when the real part as well as imaginary parts are equal, so by comparing the real and imaginary parts, the value of x and y can be found. 
If this is not what is required, Kindly repost the Question so that we can help you in better manner. 
With rgards 

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