Вопрос:

Решите уравнения: 1) \(|x + \frac{5}{12}| - 1\frac{1}{6} = 1\frac{1}{4}\) 2) \(|x - 0.25| + 3\frac{1}{2} = 4\frac{1}{3}\)

Смотреть решения всех заданий с листа

Ответ:

Решение:

  1. Уравнение 1: \(
    \)|x + \(\frac{5}{12}\)| - 1\(\frac{1}{6}\) = 1\(\frac{1}{4}\)
    \)|x + \(\frac{5}{12}\)| = 1\(\frac{1}{4}\) + 1\(\frac{1}{6}\)
    \)|x + \(\frac{5}{12}\)| = \(\frac{5}{4}\) + \(\frac{7}{6}\)
    \)|x + \(\frac{5}{12}\)| = \(\frac{15}{12}\) + \(\frac{14}{12}\)
    \)|x + \(\frac{5}{12}\)| = \(\frac{29}{12}\)

    Раскрываем модуль:

    Случай 1: \(x + \frac{5}{12} = \frac{29}{12}\)
    \(x = \frac{29}{12} - \frac{5}{12}\)
    \(x = \frac{24}{12}\)
    \(x = 2\)

    Случай 2: \(x + \frac{5}{12} = -\frac{29}{12}\)
    \(x = -\frac{29}{12} - \frac{5}{12}\)
    \(x = -\frac{34}{12}\)
    \(x = -\frac{17}{6}\)
  2. Уравнение 2: \(
    \)|x - 0.25| + 3\(\frac{1}{2}\) = 4\(\frac{1}{3}\)\)
    \)|x - 0.25| = 4\(\frac{1}{3}\) - 3\(\frac{1}{2}\)\)
    \)|x - \(\frac{1}{4}\)| = \(\frac{13}{3}\) - \(\frac{7}{2}\)\)
    \)|x - \(\frac{1}{4}\)| = \(\frac{26}{6}\) - \(\frac{21}{6}\)\)
    \)|x - \(\frac{1}{4}\)| = \(\frac{5}{6}\)\)

    Раскрываем модуль:

    Случай 1: \(x - \frac{1}{4} = \frac{5}{6}\)
    \(x = \frac{5}{6} + \frac{1}{4}\)
    \(x = \frac{10}{12} + \frac{3}{12}\)
    \(x = \frac{13}{12}\)

    Случай 2: \(x - \frac{1}{4} = -\frac{5}{6}\)
    \(x = -\frac{5}{6} + \frac{1}{4}\)
    \(x = -\frac{10}{12} + \frac{3}{12}\)
    \(x = -\frac{7}{12}\)

Ответ: 1) x = 2; x = -\(\frac{17}{6}\); 2) x = \(\frac{13}{12}\); x = -\(\frac{7}{12}\).

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