Question

7^{2x-6₌₄₉}

^_cứu 

Answer 1

7   =   49

7^2x-6   = 7²

2x - 6  =  2

2x   =  2 + 6

2x   = 8

x    = 8 : 2 

x    =  4 . Vậy x =4

 

Answer 2

\(7^{2x-6}=49\)

\(7^{2x-6}=7^2\)

\(2x-6=2\)

\(2x=2+6\)

\(2x=8\)

\(x=8:2\)

\(x=4\)

Answer 3

\(7^{2x-6}=49\)

\(7^{2x-6}=7^2\)

\(2x-6=2\)

\(2x=2+6\)

\(2x=8\)

  \(x=4\)

Vậy \(x=4\)