Tìm x, biết: a) x : 3 1/3 = 1 1/2 b) 2 2/5 : x = -1 3/5

* Hướng dẫn giải

$a)x:3\frac{1}{5}=1\frac{1}{2}$$\Rightarrow x=1\frac{1}{2}.3\frac{1}{5}=\frac{3}{2}.\frac{16}{5}=\frac{24}{5}$

$b)\text{ 2}\frac{2}{5}:x=-1\frac{3}{5}$$\Rightarrow x=2\frac{2}{5}:\left(-1\frac{3}{5}\right)=\frac{12}{5}:\left(-\frac{8}{5}\right)=-\frac{3}{2}.$