Question

Answer 1

=>2x+1=5

=>2x=4

hay x=2

Answer 2

\(3^{2x+1}=243\)

\(3^{2x+1}=3^5\)

\(2x+1=5\)

\(2x=5-1\)

\(2x=4\)

\(x=4:2\)

\(x=2\)

Answer 3

`3^(2x+1) = 243`

`=> 3^(2x+1) = 3^5`

`=> 2x+1=5`

`=> 2x = 5-1=4`

`=> x=4/2 =2`

Vậy `x=2`

Answer 4

`3^(2x+1) = 243`

`=> 3^(2x+1) = 2^5`

`=> 2x+1 =5`

`=> x =2`

Answer 5

\(3^{2x+1}=243\)

\(\Rightarrow3^{2x+1}=3^5\)

\(\Rightarrow2x+1=5\)

\(\Rightarrow2x=5-1\)

\(\Rightarrow2x=4\)

\(\Rightarrow x=4:2\)

\(\Rightarrow x=2.\)

Vậy \(x=2.\)