$\text{Giải thích các bước giải:}$
$a, 3x - \dfrac{1}{2} = \dfrac{4}{15} : \dfrac{6}{5}$
$⇔ 3x - \dfrac{1}{2} = \dfrac{4}{15} . \dfrac{5}{6}$
$⇔ 3x - \dfrac{1}{2} = \dfrac{2}{9}$
$⇔ 3x = \dfrac{2}{9} + \dfrac{1}{2}$
$⇔ 3x = \dfrac{4}{18} + \dfrac{9}{18}$
$⇔ 3x = \dfrac{13}{18}$
$⇔ x = \dfrac{13}{54}$
$b, 2\dfrac{1}{2} + \dfrac{3}{2}y = \dfrac{5}{2}$
$⇔ \dfrac{5}{2} + \dfrac{3}{2}y = \dfrac{5}{2}$
$⇔ \dfrac{3}{2}y = 0$
$⇔ y = 0$
$\huge\text{Hk tốt !}$
