Question

3.2^x+1 - 5 = 91

Answer 1

\(3.2^{x+1}-5=91\)

\(3.2^{x+1}=91+5\)

\(3.2^{x+1}=96\)

\(2^{x+1}=96:3\)

\(2^{x+1}=32\)

\(2^{x+1}=2^5\)

\(x+1=5\)

\(x=5-1\)

\(x=4\)

Answer 2

 

 

Answer 3

\(3.2^{x+1}=96\)

\(2^{x+1}=32\)

\(\Rightarrow x+1=5\)

\(x=4\)

Answer 4

`3 . 2^(x+1)-5=91`

`=>3.2^(x+1)=91+5`

`=>3.2^(x+1)=96`

`=> 2^(x+1)=96:3`

`=> 2^(x+1)=32`

`=> 2^(x+1)=2^5`

`=> x+1=5`

`=> x=5-1`

`=> x=4`

Vậy `x=4`