a, 13/6+5/8 : -3/4 - 7/12.4

= 13/6 + -5/6-7/3

=8/6-7/3

= -6/6

= -1

b, ( 73/5 - 21/3) + ( 4/3-43/5 )

= 73/5-21/3+4/3-43/5

=( 73/5-43/5)-(21/3-4/3)

= 6-17/3

=1/3

c, 7/5.4/9 +7/5: 9/16- 14/10.2/9

= 7/5.4/9 +7/5.16/9 - 14/45

=7/5.(4/9+16/9)-14/45

=7/5.20/9-14/45

= 140/45 - 14/45

= 126/45

Xong rùi nè! Nhưng bạn kiểm tra lại giùm nhé vì làm vào ban đêm nên hơi bất tiện

Trời ạ. 7 3/5 chứ k phải 73/5 -_-

ghi rõ thêm từ và nhé!

a] 4/12 ; 5/12 ; 11/2 ; 1/4

b] 1 ; 9/12; 12/5 ; 11/3

c] 8/21; 6/11;8/7

d] 2/3 ;2/7 15/2

a]1/3  5/12     11/2       1/4

b]1      3/4         12/5         33/9

c]8/21      6/11        8/7

d]2/3        2/7          15/2

a) 1/3 ; 5/12 ; 11/2 ; 1/14

b) 1 ; 9/12 ; 12/5 ; 11/3

c) 8/21 ; 6/11 ; 8/7

d) 2/3 ; 2/7 ; 15/2

a) \(\left(\frac{1}{3}+\frac{1}{5}\right)\times x=\frac{8}{25}\)

                 \(\frac{8}{15}\times x=\frac{8}{25}\)

                             \(x=\frac{8}{25}:\frac{8}{15}\)

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

Vậy x = 3/5

b) \(\frac{1}{2}:\frac{4}{5}:x=\frac{7}{3}\)

             \(\frac{5}{8}:x=\frac{7}{3}\)

                   \(x=\frac{5}{8}:\frac{7}{3}\)

                   \(x=\frac{15}{56}\)

Vậy x = 15/36

ủng hộ tớ nha. thank you nhìu

a) (1/3 + 1/5) . x = 8/25

     (5/15 + 3/15) . x = 8/25

=>   8/15 . x             = 8/25

                x             = 8/25 : 8/15

                x              = 3/5

Vậy x = 3/5

uh. nhớ nhé

a) (\(\frac{1}{3}\)+ \(\frac{1}{5}\)) x X=\(\frac{8}{25}\)

\(\frac{8}{15}\)x X = \(\frac{8}{25}\)

X= \(\frac{8}{25}\): \(\frac{8}{15}\)

X= \(\frac{3}{5}\)

b)\(\frac{1}{2}\):\(\frac{4}{5}\)x X  = \(\frac{7}{3}\)

\(\frac{5}{8}\)x X = \(\frac{7}{3}\)

X= \(\frac{7}{3}\): \(\frac{5}{8}\)

x= \(\frac{56}{15}\)

k mình nha bạn

a) \(\frac{3}{5}\times x=\frac{4}{7}\)

            \(x=\frac{4}{7}:\frac{3}{5}\)

          \(x=\frac{20}{21}\)

b) \(\frac{1}{8}:x=\frac{1}{5}\)

         \(x=\frac{1}{8}:\frac{1}{5}\)

       \(x=\frac{5}{8}\)

k nha

a)x=\(\frac{4}{7}:\frac{3}{5}\)

x=20/21

b) x=\(\frac{1}{8}:\frac{1}{5}\)

=>x=5/8

k to di mà

a) 3/5 x X=4/7

X=4/7 : 3/5

=> X= 20/21

b) 1/8 : X=1/5

X=1/8:1/5

=> X =5/8

a) \(2.\left(x+\frac{2}{5}\right)+1\frac{1}{4}=\frac{11}{20}\)

\(2.\left(x+\frac{2}{5}\right)+\frac{5}{4}=\frac{11}{20}\)

\(2.\left(x+\frac{2}{5}\right)=\frac{-7}{10}\)

\(x+\frac{2}{5}=\frac{-7}{20}\)

\(x=\frac{-13}{20}\)

Vậy \(x=\frac{-13}{20}\)

b)\(x-1\frac{1}{8}-\frac{2}{3}x-\frac{5}{6}x=75\%\)

  \(\left(x-\frac{2}{3}x-\frac{5}{6}x\right)-\frac{9}{8}=\frac{3}{4}\)

\(\frac{-1}{2}x-\frac{9}{8}=\frac{3}{4}\)

\(\frac{-1}{2}x=\frac{15}{8}\)

\(x=\frac{-15}{4}\)

Vậy \(x=\frac{-15}{4}\)

\(a,2.\left(x+\frac{2}{5}\right)+1\frac{1}{4}=\frac{11}{20}\)

\(2.\left(x+\frac{2}{5}\right)+\frac{5}{4}=\frac{11}{20}\)

\(2.\left(x+\frac{2}{5}\right)=\frac{11}{20}-\frac{5}{4}\)

\(2.\left(x+\frac{2}{5}\right)=\frac{-7}{10}\)

\(x+\frac{2}{5}=\frac{-7}{10}:2\)

\(x+\frac{2}{5}=\frac{-7}{20}\)

\(x=\frac{-7}{20}-\frac{2}{5}\)

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

địt con mẹ bọn onlinemath sex