[tex] \frac{a+b+c}{3} =3,7 =\ \textgreater \ a+b+c=3,7*3=\ \textgreater \ a+b+c=11,1\\ a= \frac{b+c}{2 } =\ \textgreater \ a= \frac{2c-4,6}{2} =\ \textgreater \ a=c-2,3\\ b=c-4,6 \\ c-2,3+c-4,6+c=11,1 \\ 3c=11,1+2,3+4,6 \\ c=18:3=\ \textgreater \ c=6 \\ a=6-2,3=\ \textgreater \ a=3,7 \\ b=6-4,6=\ \textgreater \ b=1,4[/tex]
