Bài 2. Tìm x.
a) x + \( \frac{1}{4}\) = \( \frac{5}{8}\) ; b) x - \( \frac{3}{5}\) = \( \frac{1}{10}\) ; c) x . \( \frac{2}{7}\) = \( \frac{6}{11}\) ; d) x : \( \frac{3}{2}\) = \( \frac{1}{4}\) .
Bài làm
a) x + \( \frac{1}{4}\) = \( \frac{5}{8}\) b) x - \( \frac{3}{5}\) = \( \frac{1}{10}\)
x = \( \frac{5}{8}\) - \( \frac{1}{4}\) x = \( \frac{3}{5}\) + \( \frac{1}{10}\)
x = \( \frac{3}{8}\) x = \( \frac{7}{10}\).
c) x . \( \frac{2}{7}\) = \( \frac{6}{11}\) d) x : \( \frac{3}{2}\) = \( \frac{1}{4}\)
x = \( \frac{6}{11}\) : \( \frac{2}{7}\) x = \( \frac{1}{4}\) x \( \frac{3}{2}\)
x = \( \frac{6}{11}\) x \( \frac{7}{2}\) x = \( \frac{3}{8}\)
x = \( \frac{21}{11}\).