Tìm x
2|3x-1|=4+|3x-1|
Ghi hẳn phép tính ra nha
Mai mình phải nộp rồi
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Bài 1:
a: \(\Leftrightarrow x-1\in\left\{1;-1;3;-3\right\}\)
hay \(x\in\left\{2;0;4;-2\right\}\)
Ta có : \(\left(3x-2\right)\left(4x+3\right)=\left(2-3x\right)\left(x-1\right)\)
\(\Leftrightarrow12x^2-8x+9x-6=2x-3x^2-2+3x\)
\(\Leftrightarrow12x^2-8x+9x-6-2x+3x^2+2-3x=0\)
\(\Leftrightarrow15x^2-4x-4=0\)
\(\Leftrightarrow15x^2-10x+6x-4=0\)
Lỗi :vvvv
\(\Leftrightarrow10x\left(\dfrac{3}{2}x-1\right)+4\left(\dfrac{3}{2}x-1\right)=0\)
\(\Leftrightarrow\left(10x+4\right)\left(\dfrac{3}{2}x-1\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{2}{5}\\x=\dfrac{2}{3}\end{matrix}\right.\)
Vậy ...
ra 19/27 nha vì :
2/3+1/3x(-4/9+5/6):7/12=
2/3+1/9x(-8+15/18):7/12
2/3+1/3(7/18):7/12
2/3+7/54:7/12
2/3+7/54x2/7
2/3+2/54 (Lưu ý ; QĐMS ) =108+6/162=114/162=57/81=19/27
1.a) \(\Leftrightarrow\) 3x+10-2x =0
\(\Leftrightarrow\text{ 3x-2x=-10}\)
\(\Leftrightarrow x=-10\)
b) coi lại có thiếu ngoặc ko nhé
cứ nhân vào dấu ngoặc rồi làm như thường
1 Letters are typed by Mary in the office
2 You will be helped by his father tomorrow
3 Human life has completely been changed by science and technology
4 This bottle was broken by Peter
5 English is being learned in the room
6 Maths will be being studied this time next week
7 English has been learning by me for 8 years
8 Max's car was being fixed by him from 3 pm to 5 pm yesterday
9 My mind can't be changed
10 I hadn't been told about it
\(2|3x-1|=4+|3x-1|\)
\(2|3x-1|-|3x-1|=4\)
\(|3x-1|=4\)
\(\orbr{\begin{cases}3x-1=4\\3x-1=-4\end{cases}}\)
\(\orbr{\begin{cases}3x=4+1\\3x=-4+1\end{cases}}\)
\(\orbr{\begin{cases}3x=5\\3x=-3\end{cases}}\)
\(\orbr{\orbr{\begin{cases}x=\frac{5}{3}\\x=-1\end{cases}}}\)
Vậy x =\(\frac{5}{3}\)hoặc x=\(-1\)