|12/13x – 11/12| -1=15/12 Các bạn giúp tớ nha! Hứa vote 5 sao + cảm ơn + ctlhn 05/11/2021 Bởi Sarah |12/13x – 11/12| -1=15/12 Các bạn giúp tớ nha! Hứa vote 5 sao + cảm ơn + ctlhn
$|\frac{12}{13}x-\frac{11}{12}|-1=\frac{15}{12}$ $\Leftrightarrow |\frac{12}{13}x-\frac{11}{12}|=\frac{9}{4}$ $\Leftrightarrow \left[ \begin{array}{l}\frac{12}{13}x-\frac{11}{12}=\frac{9}{4}\\\frac{12}{13}-\frac{11}{12}=-\frac{9}{4}\end{array} \right.$ $\Leftrightarrow \left[ \begin{array}{l}x=\frac{247}{72}\\x=-\frac{13}{9}\end{array} \right.$ Bình luận
|12/13x – 11/12| – 1 = 15/12 |12/13x – 11/12| = 15/12 + 1 |12/13x – 11/12| = 9/4 12/13x – 11/12 = 9/4 hoặc 12/13x – 11/12 = -9/4 * 12/13x – 11/12 = 9/4 12/13x = 9/4 + 11/12 12/13x = 19/6 x = 19/6 : 12/13 x = 247/72 * 12/13x – 11/12 = -9/4 12/13x = -9/4 + 11/12 12/13x = -4/3 x = -4/3 : 12/13 x = -13/9 Vậy x = 247/72 hoặc x = -13/9 Bình luận
$|\frac{12}{13}x-\frac{11}{12}|-1=\frac{15}{12}$
$\Leftrightarrow |\frac{12}{13}x-\frac{11}{12}|=\frac{9}{4}$
$\Leftrightarrow \left[ \begin{array}{l}\frac{12}{13}x-\frac{11}{12}=\frac{9}{4}\\\frac{12}{13}-\frac{11}{12}=-\frac{9}{4}\end{array} \right.$
$\Leftrightarrow \left[ \begin{array}{l}x=\frac{247}{72}\\x=-\frac{13}{9}\end{array} \right.$
|12/13x – 11/12| – 1 = 15/12
|12/13x – 11/12| = 15/12 + 1
|12/13x – 11/12| = 9/4
12/13x – 11/12 = 9/4 hoặc 12/13x – 11/12 = -9/4
* 12/13x – 11/12 = 9/4
12/13x = 9/4 + 11/12
12/13x = 19/6
x = 19/6 : 12/13
x = 247/72
* 12/13x – 11/12 = -9/4
12/13x = -9/4 + 11/12
12/13x = -4/3
x = -4/3 : 12/13
x = -13/9
Vậy x = 247/72 hoặc x = -13/9