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. $\mathit{\text{1. }}$

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

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

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

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

   $\text{x = }{\displaystyle \frac{12}{15}}\text{ + }{\displaystyle \frac{40}{15}}$

   $\text{x = }{\displaystyle \frac{52}{15}}$

   $\text{Vậy x = }{\displaystyle \frac{52}{15}}$

   $\mathit{\text{2. }}$

   $\mathit{\text{x}}$ $\text{x }{\displaystyle \frac{4}{7}}\text{ = }{\displaystyle \frac{5}{2}}\text{ – 1}$

   $\mathit{\text{x}}$ $\text{x }{\displaystyle \frac{4}{7}}\text{ = }{\displaystyle \frac{5}{2}}\text{ – }{\displaystyle \frac{2}{2}}$

   $\mathit{\text{x}}$ $\text{x }{\displaystyle \frac{4}{7}}\text{ = }{\displaystyle \frac{3}{2}}$

   $\mathit{\text{x}}$ $\text{= }{\displaystyle \frac{3}{2}}\text{ : }{\displaystyle \frac{4}{7}}$

   $\mathit{\text{x}}$ $\text{= }{\displaystyle \frac{3}{2}}\text{ x }{\displaystyle \frac{7}{4}}$

   $\mathit{\text{x}}$ $\text{= }{\displaystyle \frac{21}{8}}$

   $\text{Vậy}$ $\mathit{\text{x}}$ $\text{= }{\displaystyle \frac{21}{8}}$

   $\mathit{\text{@thaotrang2910}}$

   $\mathit{\text{Hoidap247}}$

    

   Trả lời