\[\boxed{\mathbf{1088\ (1088)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 20 \cdot 0,75 = 15 - 12,44 =\]
\[= 2,56\ :0,8 = 3,2\]
\[15\ :0,75 = 1500\ :75 = 20\]
\[15 - 2,56 = 12,44\]
\[2,56\ :3,2 = 25,6\ :32 = 0,8\]
\[Ответ:m = 20;\ \ x = 12,44;\ \ \]
\[n = 0,8.\]
\[2)\ 10,4 \cdot 2,6 = 27,04 + 2,96 =\]
\[= 30\ :0,24 = 125\]
\[27,04\ :2,6 = 270,4\ :26 = 10,4\]
\[30 - 27,07 = 2,96\]
\[30\ :125 = 0,24\]
\[Ответ:\ \ a = 10,4;\ \ b = 2,96;\ \ \]
\[c = 0,24.\]