Question

[huy nguyễn]

x+257=981

       x=

x-546=35

      x=

721-x=615

       x=

Answer 1

[『Kuroba ム Tsuki Ryoo ︵²ᵏ⁷』]

`@` `\text {Ans}`

`\downarrow`

`x + 257 = 981`

`=> x = 981 - 257`

`=> x = 724`

Vậy, `x = 724`

`x - 546 = 35`

`=> x = 35 + 546`

`=> x = 581`

Vậy, `x = 581`

`721 - x = 615`
`=> x = 721 - 615`

`=> x = 106`

Vậy, `x = 106`

`@` `\text {Kaizuu lv uuu}`