Cách làm cho bạn:
Ta có:
a)$x+(\frac{−2}{5})=\frac{−1}{3}$;
=> $x= \frac{1}{15}$
b) $0,5−x=\frac{−5}{14}$;
=>$x=\frac{6}{7}$
c)$(−0,4).(2x+\frac{2}{5})=−9,4$;
=>$2x= \frac{231}{10}$
=>$x= \frac{231}{20}$
d)$(\frac{3}{2}−x):\frac{−14}{3}=\frac{−6}{7}$.
=>$\frac{3}{2}−x= 4$
=>$x=\frac{-5}{2}$
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