Giải thích các bước giải:
( $\dfrac{1}{2}$ + 1,5 ) . x = $\dfrac{1}{5}$
2x = $\dfrac{1}{5}$
x = $\dfrac{1}{5}$ : 2
x = $\dfrac{1}{10}$
Vậy x = $\dfrac{1}{10}$
$\dfrac{3}{2}$ - x - $\dfrac{2}{5}$ = $\dfrac{1}{3}$ x - $\dfrac{1}{4}$
$\dfrac{11}{10}$ - x = $\dfrac{1}{3}$ x - $\dfrac{1}{4}$
-x - $\dfrac{1}{3}$ x = - $\dfrac{1}{4}$ - $\dfrac{11}{10}$
- $\dfrac{4}{3}$ x = - $\dfrac{27}{20}$
x = $\dfrac{27}{20}$ : $\dfrac{4}{3}$
x = $\dfrac{81}{80}$
Vậy x = $\dfrac{81}{80}$
CHÚC BẠN HỌC TỐT!!
