Mk kí hiệu GTTĐ là /x/ nha

Ta có t/c /a/=/b/ thì a=b hoặc -b

TH1 2x+1=3-x

2x+x=3-1

3x=2

x=2/3

TH2 2x+1=x-3

2x-x=-3-1

x=-4

Vậy x=2/3 hoặc x=-4

Mk chắc chắn đúng nha

Ko cần ktra lại đâu ^^

hok tốt

Bn có p Dâu tây k

giúp mình đi mọi người

5/6-x=2/3

x=5/6-2/3

x=1/6

4/3:x=2

x=4/3:2

x=2/3

a) x = 1/6

b) x = 2/3

\(5\frac{1}{2}-5\frac{1}{3}.\left(\frac{3}{2}.x-\frac{1}{3}\right)=1\frac{1}{2}\)

\(\frac{16}{3}\left(\frac{3}{2}.x-\frac{1}{2}\right)=5\frac{1}{2}-1\frac{1}{2}=4\)

\(\frac{3}{2}x-\frac{1}{2}=4:\frac{16}{3}=\frac{4}{3}\)

\(\frac{3}{2}x=\frac{4}{3}+\frac{1}{2}=\frac{11}{6}\)

\(x=\frac{11}{6}:\frac{3}{2}\)

\(x=\frac{11}{9}\)

\(\dfrac{2}{3}+\dfrac{1}{3}:x=\dfrac{1}{2}\)
\(\dfrac{1}{3}:x=\dfrac{1}{2}-\dfrac{2}{3}\)
\(\dfrac{1}{3}:x=-\dfrac{1}{6}\)
\(x=\dfrac{1}{3}:\left(-\dfrac{1}{6}\right)\)
\(x=-2\)
Vậy ...
#AvoidMe

`2/3 +1/3 : x=1/2`

`=> 1/3 : x= 1/2 -2/3`

`=> 1/3 : x= 3/6 -4/6`

`=> 1/3 : x=-1/6`

`=> x=1/3 :(-1/6)`

`=> x=1/3 xx (-6)`

`=> x= -2`

Vậy `x=-2`

(x+2).5=210

=(1-2)-(3-4)+(5-6)-(7-8)+...+(2021-2022)-2023
=(-1)-(-1)+(-1)-...+(-1)-2023
=0-2023
=-2023

a:\(=\left(\dfrac{3}{4}+\dfrac{2}{4}\right):\dfrac{3}{5}=\dfrac{5}{4}\cdot\dfrac{5}{3}=\dfrac{25}{12}\)

b: \(=\left(\dfrac{5}{6}-\dfrac{3}{6}\right):\dfrac{3}{2}=\dfrac{1}{3}\cdot\dfrac{2}{3}=\dfrac{2}{9}\)