Giúp với please làm ơn á

Đáp án:

`c)`

`(3x-6)*3=3^4`

`=>3x-6=3^4:3`

`=>3x-6=3^3`

`=>3x-6=27`

`=>3x=27+6`

`=>3x=33`

`=>x=33:3`

`=>x=11`

Vậy `x=11`

`c)`

`(3x-15):3=3^2`

`=>3x-15=3^2*3`

`=>3x-15=3^3`

`=>3x-15=27`

`=>3x=27+15`

`=>3x=42`

`=>x=42:3`

`=>x=14`

Vậy `x=14`

`c)`

`(3x-2^4)*7^3=2*7^4`

`=>3x-16=2*7^4:7^3`

`=>3x-16=2*7`

`=>3x-16=14`

`=>3x=14+16`

`=>3x=30`

`=>x=30:3`

`=>x=10`

Vậy `x=10`

`c)`

`(2x+2^4)*5^3=4*5^5`

`=>2x+16=4*5^5:5^3`

`=>2x+16=4*5^2`

`=>2x+16=100`

`=>2x=100-16`

`=>2x=84`

`=>x=84:2`

`=>x=42`

Vậy `x=42`