\[\boxed{\mathbf{608\ (608)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
Пояснение.
Решение.
\[1)\ 6\ :x = 36\ :30\]
\[36 \cdot x = 30 \cdot 6\]
\[x = \frac{30 \cdot 6}{36} = \frac{30}{6}\]
\[x = 5\]
\[Ответ:5.\]
\[2)\ 12\ :7 = 3\ :x\]
\[12 \cdot x = 3 \cdot 7\]
\[x = \frac{7}{4}\]
\[x = 1\frac{3}{4}\]
\[Ответ:\ \ 1\frac{3}{4}.\]
\[3)\ 4,9\ \ :0,35 = x\ :35\]
\[0,35 \cdot x = 35 \cdot 4,9\]
\[x = 35 \cdot 4,9\ :0,35\]
\[x = 35 \cdot \frac{49}{10}\ :\frac{35}{100}\]
\[x = 490\]
\[Ответ:490.\]
\[4)\ \frac{x}{21} = \frac{9}{14}\]
\[14 \cdot x = 21 \cdot 9\]
\[x = \frac{27}{2}\]
\[x = 13\frac{1}{2}\]
\[Ответ:13\frac{1}{2}.\]
\[5)\ \frac{x}{16} = \frac{3}{8}\]
\[8 \cdot x = 3 \cdot 16\]
\[x = 6\]
\[Ответ:6.\]
\[6)\ \frac{108}{90} = \frac{42}{b}\]
\[108 \cdot b = 42 \cdot 90\]
\[b = \frac{42 \cdot 90}{108} = \frac{42 \cdot 10}{12} = 7 \cdot 5\]
\[x = 35\]
\[Ответ:35.\]
\[\boxed{\mathbf{608.}\mathbf{\ }}\]
\[1)\ 100 - (48 + 26) =\]
\[= 100 - 74 =\]
\[= 26\% - капуста\ в\]
\[\ процентах.\]
\[2)\ 26\% = 0,26\]
\[1200 \cdot 0,26 =\]
\[= 312\ (кг) - собрал\ капусты.\]
\[Ответ:312\ кг.\]