Tìm x nhé các bạn.helpppppppppppp

`c) 7^{3x-2} -3.7^3 =7^3 .4`

`iff 7^{3x-2} -3.343 =4.7^3`

`iff 7^{3x-2} -3.343 =4.343`

`iff 7^{3x-2} - 1029=1372`

`iff 7^{3x-2} =1372+1029`

`iff 7^{3x-2} = 2401`

`iff 7^{3x-2} =7^4`

`iff 3x-2=4`

`iff 3x=4+2`

`iff 3x=6`

`iff x=2.`

Vậy `x=2.`