Question

64.4^x-1=4^7

Answer 1

`64 . 4^(x-1) = 4^7`

`4^3 . 4^(x-1) = 4^7`

`4^(x-1) = 4^7 : 4^3`

`4^(x-1) = 4^4`

`x-1=4`

`x=4+1`

`x=5`

Answer 2

`64.4^(x-1)=4^7`

`=> 4^3 . 4^(x-1) = 4^7`

`=> 4^(x-1) = 4^7 : 4^3`

`=> 4^(x-1) = 4^(7-3)`

`=> 4^(x-1) = 4^4`

`=> x - 1 = 4`

`=> x = 4 + 1`

`=> x = 5`

 

Answer 3

\(64\times4^{x-1}=4^7\)

\(4^3\times4^{x-1}=4^7\)

\(4^{x-1}=4^7\div4^3\)

\(4^{x-1}=4^4\)

\(x-1=4\)

\(x=4+1\)

\(x=5\)