Ребята, помогите пожалуйста сделать задание

$2*f(x)+f(\frac{1}x)=3x$
$\left \{ {2*f(2)+f(\frac{1}2)=3*2 \atop {2*f(\frac{1}2)+f(\frac{1}{\frac{1}2})=3*\frac{1}2}} \right.$

$\left \{ {f(\frac{1}2)=6-2*f(2) \atop {2*f(\frac{1}2)+f(2)=\frac{3}2}} \right.$

$\left \{ {f(\frac{1}2)=6-2*f(2) \atop {2*(6-2*f(2))+f(2)=\frac{3}2}} \right.$

$\left \{ {f(\frac{1}2)=6-2*f(2) \atop {12-4*f(2))+f(2)=\frac{3}2}} \right.$

$\left \{ {f(\frac{1}2)=6-2*f(2) \atop {-3*f(2))=\frac{3}2}-12} \right.$

$\left \{ {f(\frac{1}2)=6-2*f(2) \atop {f(2)=\frac{21}6}} \right.$

$\left \{ {f(\frac{1}2)=6-2*\frac{21}6} \atop {f(2)=\frac{21}6}} \right.$ ]

$\left \{ {f(\frac{1}2)=\frac{18}3-\frac{21}3} \atop {f(2)=\frac{21}6}} \right.$

$\left \{ {f(\frac{1}2)=-1} \atop {f(2)=\frac{21}6}} \right.$