[tex]\\$a)$\quad \text{x}+\dfrac{7}{3} = \dfrac{18}{2} \\ \\\text{x}+\dfrac{7}{3} = 9 \\ \\ \text{x} = 9-\dfrac{7}{3} \\ \\ \text{x} = \dfrac{9\cdot 3}{3}-\dfrac{7}{3} \\ \\ \text{x} = \dfrac{27-7}{3} \\ \\ \text{x} = \dfrac{20}{3}[/tex]
[tex]\\$b)$ \quad \text{x}-5 = \dfrac{13}{71} \\ \\ \text{x} = \dfrac{13}{71}+5 \\ \\ \text{x} = \dfrac{13}{71}+\dfrac{5\cdot 71}{71} \\ \\ \text{x} = \dfrac{13+5\cdot 71}{71} \\ \\ \text{x} = \dfrac{13+355}{71} \\ \\ \text{x} = \dfrac{368}{71}[/tex]
