\[\boxed{\text{444\ (444).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[5x - y = 2;\ \ A\ (4;b):\]
\[5 \cdot 4 - y = 2\]
\[20 - 2 = y\]
\[18 = y\]
\[b = 18\]
\[Ответ:b = 18.\]