2 câu trả lời
`x+9=36+17`
`=>x+9=53`
`=>x=53-9`
`=>x=44`
- Vậy `x=44`
`27+15+x=54`
`=>42+x=54`
`=>x=54-42`
`=>x=12`
- Vậy `x=12`
`x+9=36+17`
`=>x+9=53`
`=>x=53-9`
`=>x=44`
- Vậy `x=44`
`27+15+x=54`
`=>42+x=54`
`=>x=54-42`
`=>x=12`
- Vậy `x=12`