` 8/23 . 46/24 =1/3 .x`

`=>8/23 . 23/12 =1/3 . x`

`=> 1/3 . x=2/3`

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

`=>x=2/3 . 3`

`=> x= 6/3`

`=>x=2`

`----`

`1/5 : x= 1/5-1/7`

`=>1/5 : x=  7/35 - 5/35`

`=> 1/5 :x= 2/35`

`=>x= 1/5 : 2/35`

`=>x=1/5 . 35/2`

`=>x=7/2`

`----`

`4/9 - (x-1/2)^2 =1/3`

`=> (x-1/2)^2 =4/9-1/3`

`=> (x-1/2)^2 =4/9- 3/9`

`=> (x-1/2)^2 =1/9`

`=> (x-1/2)^2 = (+- 1/3)^2`

`@ TH1`

`x-1/2=1/3`

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

`=>x= 2/6 + 3/6`

``=>x= 5/6`

`@ TH2`

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

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

`=>x= -2/6 + 3/6`

`=>x=1/6`

`----`

`3,2 . x-(4/5+2/3) : 3 2/3 = 7/10`

`=> 3,2 . x-22/15 : 11/3 = 7/10`

`=>  3,2 . x-22/15 = 7/10 . 11/3`

`=>  3,2 . x-22/15 =77/30`

`=> 3,2 .x= 77/30 + 22/15`

`=> 3,2 .x=121/30`

`=>x= 121/30. 5/16`

`=>x= 121/96`

0.48 x 530 + 0.24 x 156 x 2 + 4 x 314 x 0.12

= 254,4 + 37,44 x 2 + 1256 x 0,12

= 254,4 + 74,88 + 150,72

= 329,28 + 150,72

= 480

0,48 x 530 + 0,24 x 156 x 2 + 4 x 314 x 0,12

= 0,48 x 530 + 0,48 x 156 + 0,48 x 314

= 0,48 x ( 530 + 156 + 314 )

= 0,48 x 1000

= 480

0.48 x 530 +0.24 x 156 x 2 + 4 x 314 x 0.12

= 254.4 + 74.88 + 150.72

= 480

0,24 x 450 + 0,8 x 15 x 3 + 3 x 4 x8

=0,24 x 100 x 4,5 + 0,8 x 3 x 15 + 3 x 8 x 4

=24 x 4,5 + 2,4 x 10 x 1,5 + 24 x 4

=24 x 4,5 + 24 x 1,5 + 24 x 4

=24 x (4,5 + 1,5 + 4)=24 x 10 = 240

0,24 x 450 + 0,8 x 15 x 3 + 3 x 4 x 8

= 0,24 x 100 x 45 + 0,8 x 3 x 15 + 3 x 8 x 4

= 24 x 4,5 + 2,4 x 15 + 24 x 4

= 24 x 4,5 + 24 x 1,5 + 24 x 4

= 24 x ( 4,5 + 1,5 + 4 )

= 24 x 10 = 240

ai giai ho minh bai toan nay thi minh h cho

0.24x450+0.8x15x3+3x3x8

x*0.24+x*8.86=0.36

x*(0.24+8.86)=0.36

x*9.1=0.36

x=0.36:9.1

x=0.03
 

0.25 x 4 x 3.6 : 0.125=1x3,6x1:8=0,45

5.79 x 0.24 - 0.12 x 1.58=0,24x5=1,2

nhớ k mình nhé

\(y\times0,24+y\times8,86=0,36\)

   \(y\times\left(0,24+8,86\right)=0,36\)

                          \(y\times9,1=0,36\)

                                      \(y=0,36:9,1\)

                                     \(y=\frac{18}{455}\)

Yx(0,24+8,86)=0,36

<=>Yx9,1=0,36

<=>Y=18/455

18

445 

( 260 -359 ) - (-350 + 260 ) = (260 - 260 ) +( -359 +350) = 0 +(-9) = -9

sửa lạu đề tí nha  47 x 0.24 + 53 x0.24 = 0,24.(47+53) =  0,24 . 100 =24