$$\left. \begin{array} { l } { 1 f = \frac { 3 - 1 } { 2 } i } \\ { \quad z _ { 2 } = \frac { 1 } { 2 } - \frac { 3 } { 2 } i } \\ { z _ { 1 } - z _ { 2 } = \frac { 21 + z _ { 2 } } { 24 - 2 } } \end{array} \right.$$
$f=i$
$z_{2}=\frac{1}{2}-\frac{3}{2}i=0.5-1.5i$
$z_{1}=\frac{65}{44}-\frac{69}{44}i\approx 1.477272727-1.568181818i$
