\[\boxed{\text{980\ (980).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ 2a + b = 32\]
\[2)\ 7y - 6x = 32\]
\[3)\ 0,14x - 0,18y = 1,2\]
\[\boxed{\text{980.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[f(x) = - 0,1x - 2\]
\[1)\ f(x) = 1:\]
\[- 0,1x - 2 = 1\]
\[- 0,1x = 3\]
\[x = - 30.\]
\[2)\ f(x) = - 100:\]
\[- 0,1x - 2 = - 100\]
\[- 0,1x = - 98\]
\[x = 980.\]
\[3)\ f(x) = - 43,6:\]
\[- 0,1x - 2 = - 43,6\]
\[- 0,1x = - 41,6\]
\[x = 416.\]