a, y=12,4

b, y=63,55

y: nha

ai tra loi nhanh nhat mik chon nha

\(a.y\times4,5=55,8\)

\(\Leftrightarrow y=55,8\div4,5\)

\(\Leftrightarrow y=12,4\)

\(b.y\div2,5=25,42\)

\(\Leftrightarrow y=25,42\times2,5\)

\(\Leftrightarrow y=63,55\)

Bài làm

a) Y x 4,5 = 55,8

    Y          = 55,8 : 4,5

    Y          = 12,4

b) Y : 2,5 = 25,42

    Y         = 25,42 x 2,5

    Y         = 63,55

# Hok_Tốt #

a. y x 4.5 = 55.8

y = 55.8 : 4.5

y = 12.4

b. y : 2.5 = 25.42

y = 25.42 x 2.5

y = 63.55

giup pls

`xxx4,5=55,8`

`x=55,8:4,5`

`x=12,4`

____________________

`x:2,5=25,42`

`x=25,42xx2,5`

`x=63,55`

\(x=55,8:4,5\)

\(x=12,4\)

\(x=25,42\times2,5\)

\(x=63,55\)

a, y=12,4

b, y=63,55

62/5

1271/20

y= 55.8:4.5

y= 12.4

y= 25.42x2.5

y = 63.55

a, 12,4

b, 63,55