\[\boxed{\mathbf{92\ (92)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[3*4* = 3 + 4 + * + * = 7 + * + *\]
\[3042,\ 3141,\ 3240,\ 3249,\ 3348,\ \]
\[3447,\ 3546,\ 3645,\ 3744,\ 3743,\ \]
\[3942.\]
\[Ответ:11\ решений.\]
\[\boxed{\mathbf{92}.}\]
\[1)\ 2x - 8 = 6\]
\[2x = 6 + 8\]
\[2x = 14\]
\[x = 7.\]
\[Ответ:число\ 7.\]
\[2)\ 20 - 84\ :x = 13\]
\[84\ :x = 20 - 13\]
\[84\ :x = 7\]
\[x = 84\ :7\]
\[x = 12.\]
\[Ответ:число\ 12.\]