\[\boxed{\text{120\ (120).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ 5x \geq 40\]
\[x \geq 8\]
\[x_{\min} = 8.\]
\[2)\ 5x > 40\]
\[x > 8\]
\[x_{\min} = 9.\]
\[3) - 2x < - 3\]
\[x > \frac{3}{2}\]
\[x > 1,5\]
\[x_{\min} = 2.\]
\[4) - 7x < 15\]
\[x > - \frac{15}{7}\]
\[x > - 2\frac{1}{7}\]
\[x_{\min} = - 2.\ \]