tìm x: X – 4/5=2/3:1/4 X x 4/7=5/2-1

2 bình luận về “tìm x: X – 4/5=2/3:1/4 X x 4/7=5/2-1”

1. Giải đáp + Lời giải và giải thích chi tiết:

   x – 4/5 = 2/3 : 1/4

   x – 4/5 = 2/3 . 4/1

   x – 4/5 = 8/3

   x = 8/3 + 4/5

   x = 40/15 + 12/15

   x = 52/15

   ___________________________

   x xx 4/7 = 5/x – 1

   x xx 4/7 = 5/2 – 2/2

   x xx 4/7 = 3/2

   x = 3/2 : 4/7

   x = 3/2 xx 7/4

   x = 21/8

   Trả lời
2. $\textit{1. }$

   $\text{x – $\dfrac{4}{5}$ = $\dfrac{2}{3}$ : $\dfrac{1}{4}$}$

   $\text{x – $\dfrac{4}{5}$ = $\dfrac{2}{3}$ x 4}$

   $\text{x – $\dfrac{4}{5}$ = $\dfrac{8}{3}$}$

   $\text{x = $\dfrac{4}{5}$ + $\dfrac{8}{3}$}$

   $\text{x = $\dfrac{12}{15}$ + $\dfrac{40}{15}$}$

   $\text{x = $\dfrac{52}{15}$ }$

   $\text{Vậy x = $\dfrac{52}{15}$ }$

   $\textit{2. }$

   $\textit{x}$ $\text{x $\dfrac{4}{7}$ = $\dfrac{5}{2}$ – 1}$

   $\textit{x}$ $\text{x $\dfrac{4}{7}$ = $\dfrac{5}{2}$ – $\dfrac{2}{2}$}$

   $\textit{x}$ $\text{x $\dfrac{4}{7}$ = $\dfrac{3}{2}$}$

   $\textit{x}$ $\text{= $\dfrac{3}{2}$ : $\dfrac{4}{7}$}$

   $\textit{x}$ $\text{= $\dfrac{3}{2}$ x $\dfrac{7}{4}$}$

   $\textit{x}$ $\text{= $\dfrac{21}{8}$}$

   $\text{Vậy}$ $\textit{x}$ $\text{= $\dfrac{21}{8}$}$

   $\textit{@thaotrang2910}$

   $\textit{Hoidap247}$

    

   Trả lời