2 câu trả lời
`x × 10 - 45 = 74 - 19`
`x × 10 - 45 = 55`
`x × 10 = 55 + 45`
`x × 10 = 100`
`x = 100 : 10`
`x = 10`
Vậy `x = 10`
`#dtkc`
`x × 10 - 45 = 74 - 19`
`x × 10 - 45 = 55`
`x × 10 = 55 + 45`
`x × 10 = 100`
`x = 100 : 10`
`x = 10`
`x × 10 - 45 = 74 - 19`
`x × 10 - 45 = 55`
`x × 10 = 55 + 45`
`x × 10 = 100`
`x = 100 : 10`
`x = 10`
Vậy `x = 10`
`#dtkc`
`x × 10 - 45 = 74 - 19`
`x × 10 - 45 = 55`
`x × 10 = 55 + 45`
`x × 10 = 100`
`x = 100 : 10`
`x = 10`
