When we write complex numbers in the form z=x +yi, the real part is the expression that does not have the i. The imaginary part is the partner of the i.
So, the real part, that is commonly expressed as Re(z) = x, and the imaginary part is Im(z) = y.
Then, for complex number z = 9+7i, 9 is the real part, and 7 is the imaginary part.
