\[\boxed{\text{485\ (485).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[ax + by > c\]
\[\textbf{а)}\ a = 0;\ \ b = 1;\ \ c = 3:\]
\[y > 3\]
\[\textbf{б)}\ a = 1;\ \ b = 0;\ \ c = 3:\]
\[x > 3\]