\[\boxed{\ \mathbf{1129\ (1129)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 0,11x + 0,08x = 45,6\]
\[0,19x = 45,6\]
\[x = 45,6\ :0,19\]
\[x = 240\]
\[Ответ:240.\]
\[2)\ 2,9x - 1,1x = 5,04\]
\[1,8x = 5,04\]
\[x = 5,04\ :1,8\]
\[x = 2,8\]
\[Ответ:2,8.\]
\[3)\ x - 0,64x = 2,808\]
\[0,36x = 2,808\]
\[x = 2,808\ :0,36\]
\[x = 7,8\]
\[Ответ:7,8.\]
\[4)\ 7x + 9x + 0,32 = 2,72\]
\[16x = 2,72 - 0,32\]
\[16x = 2,4\]
\[x = 2,4\ :16\]
\[x = 0,15\]
\[Ответ:0,15.\]
\[5)\ 5y + 7y - 0,024 = 0,204\]
\[12y = 0,204 + 0,024\]
\[12y = 0,228\]
\[y = 0,228\ :12\]
\[y = 0,019\]
\[Ответ:0,019.\]
\[6)\ 2,4x - 1,5x + 47 = 1919\]
\[0,9x = 1919 - 47\]
\[0,9x = 1872\]
\[x = 1872\ :0,9\]
\[x = 2080\]
\[Ответ:2080.\]
\[7)\ 0,8 \cdot (x - 1,9) = 0,56\]
\[x - 1,9 = 0,56\ :0,8\]
\[x = 0,7 + 1,9\]
\[x = 2,6\]
\[Ответ:2,6.\]
\[8)\ 0,32 \cdot (x + 1,4) = 73,6\]
\[x + 1,4 = 73,6\ :0,32\]
\[x = 230 - 1,4\]
\[x = 228,6\]
\[Ответ:228,6.\]
\[9)\ 1,7 \cdot (5x - 0,16) = 0,238\]
\[5x - 0,16 = 0,238\ :1,7\]
\[5x = 0,14 + 0,16\]
\[5x = 0,3\]
\[x = 0,3\ :5\]
\[x = 0,06\]
\[Ответ:0,06.\]
\[10)\ 0,8 \cdot (100 - 0,04x) = 8,64\]
\[100 - 0,04x = 8,64\ :0,8\]
\[0,04x = 100 - 10,8\]
\[0,04x = 89,2\]
\[x = 89,2\ :0,04\]
\[x = 2230\]
\[Ответ:2230.\]
\[11)\ x\ :1,15 = 0,16\]
\[x = 0,16 \cdot 1,15\]
\[x = 0,1840\]
\[Ответ:0,1840.\]
\[12)\ 0,408\ :x = 1,7\]
\[x = 0,408\ :1,7\]
\[x = 0,24.\]
\[Ответ:0,24.\]
\[13)\ (x + 9,14)\ :7,2 = 5\]
\[x + 9,14 = 5 \cdot 7,2\]
\[x = 36 - 9,14\]
\[x = 26,86\]
\[Ответ:26,86.\]
\[14)\ 2,2 - x\ :0,3 = 0,13\]
\[x\ :0,3 = 2,2 - 0,13\]
\[x = 2,07 \cdot 0,3\]
\[x = 0,621\]
\[Ответ:0,621.\]
\[15)\ 5,6\ :(x + 1,6) = 0,08\]
\[x + 1,6 = 5,6\ :0,08\]
\[x = 70 - 1,6\]
\[x = 68,4\]
\[Ответ:68,4.\]
\[16)\ 5,6\ :x + 0,16 = 0,3\]
\[5,6\ :x = 0,3 - 0,16\]
\[x = 5,6\ :0,14\]
\[x = 40\]
\[Ответ:40.\]
\[17)\ 4,13 - 1,7x = 4,028\]
\[1,7x = 4,13 - 4,028\]
\[1,7x = 0,102\]
\[x = 0,102\ :1,7\]
\[x = 0,06\]
\[Ответ:0,06.\]
\[18)\ 64\ :(2,4y + 19,04) = 3,2\]
\[2,4y + 19,04 = 64\ :3,2\]
\[2,4y = 20 - 19,04\]
\[y = 0,96\ :2,4\]
\[y = 0,4\]
\[Ответ:0,4.\]
\[\boxed{\mathbf{1129}\mathbf{.}\mathbf{\ }}\]
\[1)\ \frac{3}{5} \Longrightarrow \frac{5}{3}\]
\[2)\ 12 \Longrightarrow \frac{1}{12}\]
\[3)\ 3\frac{2}{9} = \frac{29}{9} \Longrightarrow \frac{9}{29}\]
\[4)\ \frac{1}{17} \Longrightarrow \frac{17}{1}\]