Question

4.2^x-3=125

Answer 1

`4*2^x=128`

`2^x=32`

`2^x=2^5`

`=>x=5`

Answer 2

\(4.2^x-3=125\)

`4.2^x = 125+ 3`

`4.2^x= 128`

`2^x = 128 : 4`

`2^x = 32`

`=> x= 5`

Answer 3

`4.2^x - 3 = 128`

`=> 4.2^x = 125 + 3`

`=> 4.2^x = 128`

`=>   2^x  = 128 : 4`

`=>  2^x    = 32`

`=> 2^x     = 2^5`

`=> x=5`

 

Answer 4

\(4.2^x-3=125.\)

\(4.2^x=125+3.\)

\(4.2^x=128.\)

\(2^x=128:4.\)

\(2^x=32.\)

\(2^x=2^5.\)

Vậy \(\Rightarrow x=5.\)