\(\left[7\times13+8\times13\right]:\left[9\frac{2}{3}-y\right]=39\)

\(\left[\left(7+8\right)\times13\right]:\left[\frac{29}{3}-y\right]=39\)

\(\left[15\times13\right]:\left[\frac{29}{3}-y\right]=39\)

\(195:\left[\frac{29}{3}-y\right]=39\)

\(\frac{29}{3}-y=195:30\)

\(\frac{29}{3}-y=\frac{13}{2}\)

\(y=\frac{29}{3}-\frac{13}{2}\)

\(y=\frac{19}{6}\)

Học tốt #

[ 7 x 13 + 8 x 13 ] : [ \(9\frac{2}{3}\) - y ] = 39

[ 13 x ( 7 + 8 )]     :  [ \(9\frac{2}{3}\)- y  ]  = 39

[ 13 x 15 ]            :  [\(9\frac{2}{3}\) - y  ]   = 39

195                      : [\(\frac{29}{3}\)  - y  ]   = 39

                              [ \(\frac{29}{3}\) - y  ]   = 195 : 39 (^*1 )

                              [\(\frac{29}{3}-y\)]  = 5

                            y                         = \(\frac{29}{3}-5\)

                           y                          = \(\frac{14}{3}\)

\(\left(7.13+8.13\right)\div\left(9\frac{2}{3}-y\right)=39\)

\(\Rightarrow\left(91+104\right)\div\left(\frac{29}{3}-y\right)=39\)

\(\Rightarrow195\div\left(\frac{29}{3}-y\right)=39\)

\(\Rightarrow\frac{29}{3}-y=195\div39\)

\(\Rightarrow\frac{29}{3}-y=5\)

\(\Rightarrow y=\frac{29}{3}-5\)

\(\Rightarrow y=\frac{14}{3}\)

Vậy \(y=\frac{14}{3}\)

a) \(y-6:2-\left(48-24.2:6-3\right)=0.\)

\(\Rightarrow y-3-\left(48-8-3\right)=0\)

\(\Rightarrow y-3-37=0\)

\(\Rightarrow y=0+37+3=40\)

Vậy y = 40

b) \(\left(7.13+8.13\right):\left(9\frac{2}{3}-y\right)=39\)

\(\Rightarrow195:\left(\frac{29}{3}-y\right)=39\)

\(\Rightarrow\frac{29}{3}-y=195:39=5\)

\(\Rightarrow y=\frac{29}{3}-5=\frac{14}{3}\)

Vậy y=\(\frac{14}{3}\)

a) y - 6 : 2 - ( 48 - 24 x 2 : 6 - 3 ) = 0

y - 6 : 2 - ( 48 - 48 : 6 - 3 ) = 0

y - 6 : 2 - ( 48 - 8 - 3 ) = 0

y - 6 : 2 - 37 = 0

y - 3 = 0 + 37

y - 3 = 37

y = 37 + 3

y = 40

b) ( 7 x 13 + 8 x 13 ) : (  \(9\frac{2}{3}\) - y ) = 39

( 15 x 13 ) : ( \(9\frac{2}{3}\) - y ) = 39

195 : ( \(9\frac{2}{3}\) - y ) = 39

\(9\frac{2}{3}\) - y = 195 : 39

\(9\frac{2}{3}-y=5\)

\(y=9\frac{2}{3}-5\)

\(y=\frac{14}{3}\)

 a,  y - 6 : 2 - ( 48 - 24 x 2 : 6 - 3 ) = 0 

     y - 3 - 37 = 0 

     y - 3 = 0 + 37 

     y - 3 = 37 

     y = 37 + 3

     y = 40 

b,  ( 7 x 13 + 8 x 13 ) : ( \(9\frac{2}{3}\) - y ) = 39

     195 : ( \(\frac{29}{3}\)- y ) = 39 

     \(\frac{29}{3}\)- y = 195 : 39 

   \(\frac{29}{3}\)- y = 5

  y = \(\frac{29}{3}\)- 5 

y = \(\frac{14}{3}\)

tích mình đi

ai tích mình

mình ko tích lại đâu

thanks

tích mình với

ai tích mình

mình tích lại

thanks

\(\left(7\times13+8\times13\right)\div\left(9\frac{2}{3}-x\right)=39\)

\(\left[\left(7+8\right)\times13\right]\div\left(\frac{29}{3}-x\right)=39\)

\(\left(15\times13\right)\div\left(\frac{29}{3}-x\right)=39\)

\(195\div\left(\frac{29}{3}-x\right)=39\)

\(\frac{29}{3}-x=195\div39\)

\(\frac{29}{3}-x=5\)

\(x=\frac{29}{3}-5\)

\(x=\frac{29}{3}-\frac{15}{3}\)

\(x=\frac{14}{3}\)

a. Tính đúng y = 40

b. Tính đúng  y = 4 2 3

dấu ghạch chéo là j

là chia

y=8.5 nha 

a) \(\frac{18}{45}-\frac{4}{12}-\frac{6}{9}-\frac{21}{35}=\frac{2}{5}-\frac{1}{3}-\frac{2}{3}-\frac{3}{5}\)

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

\(=\frac{-1}{3}-1\)

\(=\frac{-4}{3}\)

b) \(\frac{4}{3}+\frac{3}{5}+\frac{7}{3}+\frac{2}{5}+\frac{1}{3}=\left(\frac{4}{3}+\frac{7}{3}+\frac{1}{3}\right)+\left(\frac{3}{5}+\frac{2}{5}\right)\)

\(=4+1=5\)

c) \(\frac{1}{3}.\frac{4}{5}.\frac{1}{3}.\frac{6}{5}=\frac{8}{75}\)

d) \(\frac{6}{7}.\frac{8}{13}+\frac{6}{7}.\frac{9}{13}-\frac{3}{13}.\frac{6}{7}\)

\(=\frac{6}{7}.\left(\frac{8}{13}+\frac{9}{13}-\frac{3}{13}\right)\)

\(=\frac{6}{7}.\frac{14}{13}\)

\(=\frac{12}{13}\)

1: =-2/9(15/17+2/17)=-2/9

2: \(=\dfrac{-6}{3}+\dfrac{-21}{90}\)

=-2-7/30=-67/30

3: \(=\dfrac{3}{4}\cdot\dfrac{7}{5}+\dfrac{9}{7}\cdot\dfrac{3}{2}\)

=21/20+27/14=417/140

4: =-25/13(5/19+14/19)=-25/13

5: =-7/5-45/21=-7/5-15/7=-124/35

1: =-2/9(15/17+2/17)=-2/9

2: =34⋅75+97⋅32=34⋅75+97⋅32

=21/20+27/14=417/140

4: =-25/13(5/19+14/19)=-25/13

5: =-7/5-45/21=-7/5-15/7=-124/35

y=14/3

vừa làm bên dưới

\(\frac{14}{3}\)

y = 14/3

tick mk cái coi mọi người

1, 476 : x =28

               x=476 : 28

               x=17

Vậy x= 17

,2, x : 26 = 39

     x=39 . 26

     x=1014

Vậy x= 1014

Thôi nhiều quá mình không trả lời được

~Thôi chúc bạn học giỏi~

1)476:x=28

x=476:28

x=17

2)x:26=39

x=39x26

x=1014

476 : x = 68

x.          = 476 : 68 

x.          = 7