\[\boxed{\text{135\ (135).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[Составим\ уравнения\ по\ \]
\[условию\ и\ решим\ их.\]
\[\textbf{а)}\ 2m - 13 = m + 3\]
\[2m - m = 3 + 13\]
\[m = 16\]
\[Ответ:при\ m = 16.\]
\[\textbf{б)}\ 3 - 5c + 1 = 1 - c\]
\[- 5c + c = 1 - 4\]
\[- 4c = - 3\]
\[c = - 3\ :( - 4)\]
\[c = \frac{3}{4}\ \]
\[Ответ:при\ c = \frac{3}{4}.\]
\[\textbf{в)}\ 2x + 1 - 20 = 8x + 5\]
\[2x - 8x = 5 + 19\]
\[- 6x = 24\]
\[x = 24\ :( - 6)\]
\[x = - 4\]
\[Ответ:при\ x = - 4.\]
\[\textbf{г)}\ 3x = 45 - 10x\]
\[3x + 10x = 45\]
\[13x = 45\]
\[x = 45\ :13\]
\[x = 3\frac{6}{13}\]
\[Ответ:x = 3\frac{6}{13}.\]
\[\textbf{д)}\ 9 - y = 2y\]
\[- y - 2y = - 9\]
\[- 3y = - 9\]
\[3y = 9\]
\[y = 9\ :3\]
\[y = 3\]
\[Ответ:y = 3.\]