Question

 7^x + 135 : 45=52

 

Answer 1

 7^x + 135 : 45=52 

7^x + 3 = 52 

7^{x= 52 - 3} 

7^{x= 49} 

7^{x= \(7^2\)}

^{\(\Rightarrow\)} x=2

Answer 2

7^x + 135 :45 =52

7^x + 3 =52

7^x = 52-3

7^x = 49

x = 2

Answer 3

\(7^x+135:45=52\)

\(7^x+3=52\)

\(7^x=52-3\)

\(7^x=49\)

\(7^x=7^2\)

vậy x=2