Question

a, x : [(1800 + 600) : 30] = 560 : (315 - 35)

b,[(250 - 25) :15] : \(x\) = (450 - 60) : 130

Answer 1

a. biểu thức tương đương:

\(x:\left(\dfrac{2400}{30}\right)=\dfrac{560}{280}=2\)

=> \(x=2\times\dfrac{2400}{30}=160\)

Answer 2

\(a,x:\left(2400:30\right)=560:280\\ =>x:80=2\\ =>x=\dfrac{2}{80}=\dfrac{1}{40}\\ b,\left(225:15\right):x=390:130\\ =>15:x=3\\ =>x=5\)

Answer 3

`x : [(1800 + 600) : 30] = 560 : (315 - 35)`

`x : [(1800 + 600) : 30] = 560 : 280`

`x : [(1800 + 600) : 30] = 2`

`x : [ 2400 : 30] = 2`

`x : 80 = 2`

`x=2xx80`

`x=160`

_____________________________

`[(250 - 25) :15] : x = (450 - 60) : 130`

`[(250 - 25) :15] : x = 390 : 130`

`[(250 - 25) :15] : x =3`

`[225 : 15] : x =3`

`15 : x = 3`

`x=15:3`

`x=5`

Answer 4

a: \(\Leftrightarrow x:\left[2400:30\right]=560:280=2\)

=>x:80=2

=>x=160

b: \(\Leftrightarrow\left[225:15\right]:x=390:130=3\)

=>15/x=3

hay x=5