Решебник по математике 6 класс Виленкин ФГОС Часть 1, 2 Часть 2. П. 5. Решение уравнений Задание 97

\[\boxed{\text{5.\ 97}}\]

\[\textbf{а)}\ 7x - 21 = 6x + 3\]

\[7x - 6x = 3 + 21\]

\[x = 24.\ \]

\[\textbf{б)} - 10n + 7 = - 11n - 3\]

\[- 10n + 11n = - 3 - 7\]

\[n = - 10.\]

\[\textbf{в)}\ 5c + 13 = 6c + 23\]

\[5c - 6c = 23 - 13\]

\[- c = 10\]

\[c = - 10.\]

\[\textbf{г)} - 24c - 9 = 23c - 9\]

\[- 24c - 23c = - 9 + 9\]

\[- 45c = 0\]

\[c = 0.\]

\[\textbf{д)}\ 8 + 27a = 10 + 26a\]

\[27a - 26a = 10 - 8\]

\[a = 2.\]

\[\textbf{е)}\ 13 - 7x = 14 - 8x\]

\[- 7x + 8x = 14 - 13\]

\[x = 1.\]

\[\textbf{ж)}\ 9n + 6 = - 4 + 10n\]

\[9n - 10n = - 4 - 6\]

\[- n = - 10\]

\[n = 10.\]

\[\textbf{з)}\ 2 - 5x = 4 - 6x\]

\[- 5x + 6x = 4 - 2\]

\[x = 2.\]