$$\left. \begin{array} { l } { a = ( b + c ) = ( a + b ) + ( a + c ) } \\ { a = 24 , b = - 2 , c = 4 } \end{array} \right.$$
$a=b+c$
$b\in \mathrm{C}$
$c\in \mathrm{C}$
$a=b+c$
$b\in \mathrm{R}$
$c\in \mathrm{R}$
