\(\left(x-6\right)^2=9=3^2=\left(-3\right)^2\)

\(=>\orbr{\begin{cases}x-6=3\\x-6=-3\end{cases}=>\orbr{\begin{cases}x=9\\x=3\end{cases}}}\)

Vậy...............

\(\left(x-6\right)^2=9\)

\(=>\sqrt{\left(x-6\right)^2}=\sqrt{9}\)

\(=>x-6=3\)

\(=>x=6+3\)

\(=>x=9\)

Ủng hộ nha

\(\frac{x}{468}=-\frac{7}{13}\times\frac{5}{9}\)

\(\Leftrightarrow\frac{x}{468}=-\frac{35}{117}\)

\(\Leftrightarrow x.117=-35\times468\)

\(\Leftrightarrow x.117=-14976\)

\(\Leftrightarrow x=-128\)

Vậy \(x=-128\)

x/468=-7/13x 5/9

x/468=-35/117

=>x.117=-35.468

=>x.117=-16380

       x=-16380:117

       x=-140

Vậy x= -140.

gọi phân số cần tìm là a/7. ta có : a/7 = a + 16 / 7x 5 

Quy đồng mẫu : 5a/ 35 = a + 16 / 35 

=> 5a = a +16

=> 4a = 16 

=> a = 4

18 bạn nnhes

`5/9+4/9:x=1/3`

`=>4/9:x=1/3-5/9`

`=>4/9:x=3/9-5/9`

`=>4/9:x=-2/9`

`=>x=4/9:(-2/9)`

`=>x=4/9.(-9/2)`

`=>x=-4/2`

`=>x=-2`

`5/9 + 4/9 : x= 1/3`

`=> 4/9 : x= 1/3-5/9`

`=> 4/9 : x= 3/9-5/9`

`=> 4/9 : x= -2/9`

`=> x= 4/9 :(-2/9)`

`=>x= 4/9 xx (-9/2)`

`=>x= -36/18`

`=>x=-2`

( x - 140) : 7 = 3^ 3 - 2^3. 3

( x - 140) : 7 = 27 - 24

( x - 140) : 7 = 3

 ( x - 140)    = 3.7

( x - 140)     = 21

x                  = 21 + 140

x                  = 161

(x-140):7=27-24

(x-140):7=3

x-140=21

x=161

Sửa đề nhé , đề sai :

\(\text{Ta có : }A=b\left(a-c\right)-c\left(a+b\right)\)

\(\Leftrightarrow A=ba-bc-ca-cb\)

\(\Leftrightarrow A=ab-ca\)

\(\Leftrightarrow A=a\left(b-c\right)\)

\(\Leftrightarrow A=\left(-20\right)\left(-5\right)\)

\(\Rightarrow A=100\)

-4/x-2/=-8 =>/x-2/=2 =>x=0

-7/x+4/=-14 =>/x+4/=2 =>x=-2

tik cho mk nha