@ Đạt em
Xem cách giải sau :
↓↓↓↓↓↓↓↓↓
Tìm x
a) 2 `3/11` - X = `5/44`
`25/11` - X = `5/44`
X = `25/11` - `5/44`
X = `95/44`
b) `3/4` - X x `1/2` = `1/2`
X x `1/2` = `3/4` - `1/2`
X x `1/2` = `3/4` - `2/4`
X x `1/2` = `1/4`
X = `1/4` : `1/2`
X = `1/4` . `2/1`
X = `2/4`
X = `1/2`
c) X : `2/7` = 34,5 - 6,5
X : `2/7` = 28
X = 28 x `2/7`
X = 8