Question

A, Thực hiện phép tính 23.64+23.63 b, tìm số tự nhiên x biết 3x-8=2mũ6 :2mũ4 Giúp e vs ạ e cần gấp ạ

Answer 1

`23xx64+23xx63`

`=23xx(64+63)`

`=23xx127`

`=2921`

`_-_-_-_-_`

`3x-8 = 2^6 : 2^4`

`=>3x-8=2^2`

`=>3x-8=4`

`=>3x=4+8`

`=>3x=12`

`=>x=12/3`

`=>x=4`

Answer 2

`23.64+23.63= 23(64+63)=23.127=2921`

`-----------------`

`3x-8=2^6 :2^4`

`=> 3x-8=2^2`

`=> 3x-8=4`

`=>3x= 4 +8`

`=>3x= 12`

`=>x=12:3`

`=>x=4`