a) 24/35

b) 2/5

c) 1/6

d) 1/7

a) 24/35
b) 2/5
c) 1/6
d) 1/7

5 mũ 56,nha bạn

kết quả là 5 ^ ⁵⁶

\(\left(\frac{3}{5}-x\right)+\frac{13}{20}=\frac{5}{6}\)

\(\frac{3}{5}-x=\frac{5}{6}-\frac{13}{20}\)

\(\frac{3}{5}-x=\frac{11}{60}\)

\(x=\frac{3}{5}-\frac{11}{60}\)

\(x=\frac{5}{12}\)

\(\left(x-\frac{1}{2}\right)\cdot\frac{5}{3}=\frac{7}{4}-\frac{1}{2}\)

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

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

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

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

\(x=\frac{5}{4}\)

( 3/5 - x ) + 13/20 = 5/6

  3/5 - x                = 5/6 - 13/20

  3/5 - x                = 89/60

          x                = 3/5 - 89/60

          x                = 25/12

( x - 1/2 ) x 5/3 = 7/4 - 1/2

( x - 1/2 ) x 5/3 = 5/4

 x - 1/2             = 5/4 : 5/3

 x - 1/2             = 35/12

 x                     = 35/12 + 1/2

 x                     = 41/12

  (3/5-x)+13/20=5/6

3/5-x              =5/6-13/20

3/5-x              =11/60

      x              =3/5-11/60

      x              =5/12

Vậy x = 5/12

(x-1/2)x5/3=7/4-1/2

(x-1/2)x5/3=5/4

 x-1/2        =5/4:5/3

 x-1/2        =3/4

 x              =3/4+1/2

 x              =5/4

Vậy x=5/4

chúc bạn học tốt

cá voi xanh không ? :))))

cá voi xanh không ? :))))

\(\left(x-\frac{1}{2}\right)\cdot\frac{5}{2}+\frac{1}{2}=\frac{7}{4}\)

=> \(\left(x-\frac{1}{2}\right)\cdot\frac{5}{2}=\frac{7}{4}-\frac{1}{2}\)

=> \(\left(x-\frac{1}{2}\right)\cdot\frac{5}{2}=\frac{7}{4}-\frac{2}{4}=\frac{5}{4}\)

=> \(\left(x-\frac{1}{2}\right)=\frac{5}{4}:\frac{5}{2}\)

=> \(\left(x-\frac{1}{2}\right)=\frac{5}{4}\cdot\frac{2}{5}=\frac{1}{2}\)

=> \(x=\frac{1}{2}+\frac{1}{2}=1\)

Vậy x = 1

a, y \(\times\) \(\dfrac{4}{3}\) = \(\dfrac{16}{9}\)

    y         =    \(\dfrac{16}{9}\) : \(\dfrac{4}{3}\)

    y         = \(\dfrac{4}{3}\)

b, ( y - \(\dfrac{1}{2}\)) + 0,5 = \(\dfrac{3}{4}\)

    y - 0,5 + 0,5 = \(\dfrac{3}{4}\)

   y                   = \(\dfrac{3}{4}\)

c, \(\dfrac{4}{5}-\dfrac{2}{5}y\) = 0,2

   0,8 - 0,4y = 0,2

           0,4y = 0,8 - 0,2

           0,4y  = 0,6

               y = 1,5

d, (y + \(\dfrac{3}{4}\)) \(\times\) \(\dfrac{5}{7}\) = \(\dfrac{10}{9}\)

    y + \(\dfrac{3}{4}\)           = \(\dfrac{10}{9}\) : \(\dfrac{5}{7}\)

   y + \(\dfrac{3}{4}\)            = \(\dfrac{14}{9}\)

y                    = \(\dfrac{14}{9}\) - \(\dfrac{3}{4}\)

 y                   =   \(\dfrac{29}{36}\)

e, y : \(\dfrac{5}{4}\)         = \(\dfrac{9}{5}\)  + \(\dfrac{1}{2}\)

   y : \(\dfrac{5}{4}\)         =   \(\dfrac{23}{10}\)

  y                =      \(\dfrac{23}{10}\)

  y               =   \(\dfrac{23}{8}\)

f, y \(\times\) \(\dfrac{1}{2}\) + \(\dfrac{3}{2}\) \(\times\) y   = \(\dfrac{4}{5}\)

   y \(\times\) ( \(\dfrac{1}{2}+\dfrac{3}{2}\))      =  \(\dfrac{4}{5}\)

   2y                       = \(\dfrac{4}{5}\)

    y                        = \(\dfrac{2}{5}\)

Ca này bó tay rồi, ghi rõ ra đc ko, khó hiểu quá

1) = \(\frac{3}{5}\)

2) =\(\frac{6}{7}\)

3)\(\frac{9}{13}\)

4)\(\frac{4}{13}\)