Đề bài

Tìm x:

a) $x + \left( { - \dfrac{2}{5}} \right) = \dfrac{{ - 1}}{3}$;                                           

b) $0,5 - x = \dfrac{{ - 5}}{{14}}$;

c) $( - 0,4).\left( {2x + \dfrac{2}{5}} \right) =  - 9,4$;                

d) $\left( {\dfrac{3}{2} - x} \right):\dfrac{{ - 14}}{3} = \dfrac{{ - 6}}{7}$.