Tìm x a) (\(\frac{1}{3}\)x X) : \(\frac{2}{3}\) = \(4\frac{3}{8}\) b) \(1\frac{2}{3}\) x X -...
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Tìm x
a) (\(\frac{1}{3}\)x X) : \(\frac{2}{3}\) = \(4\frac{3}{8}\) b) \(1\frac{2}{3}\) x X - \(\frac{1}{4}\) = \(\frac{5}{6}\)
Lời giải:
a. $(\frac{1}{3}x):\frac{2}{3}=4\frac{3}{8}$
$\frac{1}{3}x=4\frac{3}{8}.\frac{2}{3}=\frac{35}{12}$
$x=\frac{35}{12}:\frac{1}{3}=\frac{35}{4}$
b.
$1\frac{2}{3}x-\frac{1}{4}=\frac{5}{6}$
$\frac{5}{3}x=\frac{5}{6}+\frac{1}{4}=\frac{13}{12}$
$x=\frac{13}{12}:\frac{5}{3}=\frac{13}{20}$