b) x - 5/ = -7/6

* Hướng dẫn giải

b) $\mathrm{x}-\frac{5}{8}=\frac{-7}{6}$

$\begin{array}{l}\mathrm{x}=\frac{-7}{6}+\frac{5}{8}\\ \mathrm{x}=\frac{-7.4}{6.4}+\frac{5.3}{8.3}\\ \mathrm{x}=\frac{-28}{24}+\frac{15}{24}\\ \mathrm{x}=\frac{-\left(28-15\right)}{24}\\ \mathrm{x}=\frac{-13}{24}\\ \mathrm{Vậy} \mathrm{x}=\frac{-13}{24}\end{array}$