Tìm x

* Hướng dẫn giải

 $$\begin{gathered} a) 1\frac{5}{7}\times x= 2\frac{3}{6} \\ \frac{12}{7}\times x= \frac{15}{6} \\ x= \frac{15}{6}: \frac{12}{7} \\ x= \frac{15}{6}\times \frac{7}{12} \\ x= \frac{105}{72} \\ x= \frac{35}{24} \end{gathered}$$                              $$\begin{gathered} b) \frac{29}{7}-x=\frac{3}{2} \\ x= \frac{29}{7}-\frac{3}{2} \\ x= \frac{58}{14}-\frac{21}{14} \\ x= \frac{37}{14} \end{gathered}$$