\[\boxed{\mathbf{106\ (106).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 12 = 2^{2} \cdot 3\]
\[2)\ 42 = 2 \cdot 3 \cdot 7\]
\[3)\ 216 = 2^{3} \cdot 3^{3}\]
\(\ \)
\[4)\ 450 = 2 \cdot 3^{2} \cdot 5^{2}\]
\[5)\ 920 = 2^{3} \cdot 5 \cdot 23\]
\[6)\ 2280 = 2^{3} \cdot 3 \cdot 5 \cdot 19\]
\[7)\ 10\ 850 = 2 \cdot 5^{2} \cdot 7 \cdot 31\]
\[\boxed{\mathbf{106}.}\]
\[1)\ 73y - y - 22y + 40 = 190\]
\[50y = 190 - 40\]
\[50y = 150\]
\[y = 150\ :50\]
\[y = 3.\]
\[2)\ 56 + 72\ :(x - 12) = 60\]
\[72\ :(x - 12) = 60 - 56\]
\[72\ :(x - 12) = 4\]
\[x - 12 = 72\ :4\]
\[x - 12 = 18\]
\[x = 18 + 12\]
\[x = 30.\]