Question

7²-7(13-x)=14 cho em lời giải ạ

Answer 1

`7^2 -7(13-x) =14`

`=> 7(13-x) =7^2 -14 = 49-14`

`7(13-x)= 35`

`=> 13-x = 35/7 =5`

`=> x =13-5 = 8`

Vậy `x=8`

Answer 2

`7^2 -7(13-x)=14 `

`=>49-7(13-x)=14`

`=>7(13-x)=49-14`

`=>7(13-x)=35`

`=>13-x= 35:7`

`=>13-x=5`

`=>x=13-5`

`=>x=8`