Question

$$C_{1}=10F; C_{2}=20F; C_{3}=4OF$$

Solve for C_1, F, C_2, C_3, O (complex solution)

$C_{1}=10F$
$F\in \mathrm{C}$
$C_{2}=20F$
$C_{3}=4FO$
$O\in \mathrm{C}$

Solve for C_1, F, C_2, C_3, O

$C_{1}=10F$
$F\in \mathrm{R}$
$C_{2}=20F$
$C_{3}=4FO$
$O\in \mathrm{R}$