Решебник по математике 6 класс Мерзляк ФГОС Задание 1135

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\[1) - 7x + 4x - 8x = - 9,9\]

\[- 11x = - 9,9\]

\[x = 0,9\]

\[Ответ:0,9.\]

\[2)\ 0,6y - 1,9y - 0,5y = 0,54\]

\[- 1,8y = 0,54\]

\[y = - 0,3\]

\[Ответ:\ - 0,3.\]

\[3)\frac{1}{8}x - \frac{2}{3}x + \frac{1}{2}x = - \frac{5}{18}\]

\[\frac{3 - 16 + 12}{24}x = - \frac{5}{18}\]

\[- \frac{1}{24}x = - \frac{5}{18}\]

\[x = 6\frac{2}{3}\]

\[Ответ:6\frac{2}{3}.\]

\[4) - 9\frac{5}{6}b + 2\frac{3}{4}b + 1\frac{5}{12}b =\]

\[= 1\frac{7}{27}\]

\[\left( - 9\frac{10}{12} + 2\frac{9}{12} + 1\frac{5}{12} \right)b = 1\frac{7}{27}\]

\[\left( - 9\frac{10}{12} + 3\frac{14}{12} \right)b = 1\frac{7}{27}\]

\[\left( - 9\frac{10}{12} + 4\frac{2}{12} \right)b = 1\frac{7}{27}\]

\[- 5\frac{\ 8}{12}b = 1\frac{7}{27}\]

\[- 5\frac{2}{3}b = 1\frac{7}{27}\]

\[Ответ:\ - \frac{2}{9}.\]