Giải giúp mình nha :)) (X-2/5)+1/5=7/5

2 bình luận về “Giải giúp mình nha :)) (X-2/5)+1/5=7/5”

1. $\text{ ( $x$ – $\dfrac{2}{5}$) + $\dfrac{1}{5}$ = $\dfrac{7}{5}$ }$
   $\text{ ( $x$ – $\dfrac{2}{5}$) = $\dfrac{7}{5}$ – $\dfrac{1}{5}$ }$

   $\text{ $x$ – $\dfrac{2}{5}$= $\dfrac{6}{5}$}$

   $\text{ $x$ = $\dfrac{6}{5}$ + $\dfrac{2}{5}$}$
   $\text{ $x$ = $\dfrac{8}{5}$}$

   Trả lời
2. (x-2/5)+1/5=7/5

   =>x-2/5=7/5-1/5

   =>x-2/5=6/5

   =>x=6/5+2/5

   =>x=8/5

   Vậy x=8/5

    

   Trả lời