Bài 2: Tìm x: a) \(\frac{2}{7}\) x X = \(\frac{2}{3}\) b) \(\frac{2}{5}\) : X = \(\frac{1}{3}\) c) X
Bài 2: Tìm x:
a) \(\frac{2}{7}\) x X = \(\frac{2}{3}\)
b) \(\frac{2}{5}\) : X = \(\frac{1}{3}\)
c) X : \(\frac{7}{11}\) = 22.
Lời Giải:
Bài 2:
a) \(\frac{2}{7}\) x X = \(\frac{2}{3}\)
X = \(\frac{2}{3}\) - \(\frac{2}{7}\)
X = \(\frac{7}{3}\)
b) \(\frac{2}{5}\) : X = \(\frac{1}{3}\)
X = \(\frac{2}{5}\) : \(\frac{1}{3}\)
X = \(\frac{6}{5}\)
c) X : \(\frac{7}{11}\) = 22
X = 22 x \(\frac{7}{11}\)
X = 14