║x-4/5 ║=3/4 hellllllllllllllllllllllllllllllllllllll 08/09/2021 Bởi Camila ║x-4/5 ║=3/4 hellllllllllllllllllllllllllllllllllllll
| x – 4/5 | = 3/4 TH1: x – 4/5 = 3/4 => x = 3/4 + 4/5 => x = 31/20 TH2: x – 4/5 = -3/4 => x = (-3/4) + 4/5 => x = 1/20 Vậy x = 31/20 hoặc x = 1/20. Bình luận
Đáp án: `x ∈ {31/20; 1/20}` Giải thích các bước giải: `|x – 4/5| = 3/4` $⇒ \left[ \begin{array}{l}x – \dfrac{4}{5}=\dfrac{3}{4}\\x – \dfrac{4}{5}=\dfrac{-3}{4}\end{array} \right. ⇒ \left[ \begin{array}{l}x=\dfrac{31}{20}\\x=\dfrac{1}{20}\end{array} \right.$ `Vậy` `x ∈ {31/20; 1/20}` Bình luận
| x – 4/5 | = 3/4
TH1: x – 4/5 = 3/4
=> x = 3/4 + 4/5
=> x = 31/20
TH2: x – 4/5 = -3/4
=> x = (-3/4) + 4/5
=> x = 1/20
Vậy x = 31/20 hoặc x = 1/20.
Đáp án:
`x ∈ {31/20; 1/20}`
Giải thích các bước giải:
`|x – 4/5| = 3/4`
$⇒ \left[ \begin{array}{l}x – \dfrac{4}{5}=\dfrac{3}{4}\\x – \dfrac{4}{5}=\dfrac{-3}{4}\end{array} \right. ⇒ \left[ \begin{array}{l}x=\dfrac{31}{20}\\x=\dfrac{1}{20}\end{array} \right.$
`Vậy` `x ∈ {31/20; 1/20}`