\[\boxed{\mathbf{Вариант\ 1.}}\]
\[\boxed{\mathbf{1.}}\]
\[1)\]
\[2)\ \]
\[\boxed{\mathbf{2.}}\]
\[1)\ 70 + x = 24 \cdot 4\]
\[70 + x = 96\]
\[x = 96 - 70\]
\[x = 26\]
\[Ответ:x = 26.\]
\[2)\ y - 120 = 280\ :7\]
\[y - 120 = 40\]
\[y = 40 + 120\]
\[y = 160\]
\[Ответ:y = 160.\]
\[\boxed{\mathbf{3.}}\]
\[12 + 5 = 17\ (чайников) -\]
\[стало\ больше.\]
\[Ответ:на\ 17\ чайников.\]