\[\boxed{\mathbf{90\ (90)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
Пояснение.
Решение.
\[2340,\ 6345 \Longrightarrow 2\ числа.\]
\[\boxed{\mathbf{90}.}\]
\[y = 5x - 9\]
\[1)\ x = 18:\]
\[y = 5 \cdot 18 - 9 = 90 - 9 = 81.\]
\[2)\ x = 23:\]
\[y = 5 \cdot 23 - 9 = 115 - 9 = 106.\]