Question

2.

(4 +x ) .3^3 = 3^5

 

Answer 1

\((4+x).3^3=3^5\) 

\((4+x).27=243\)    

\(4+x=243:27 \) 

\(4+x=9\) 

\(x=9-4\) 

\(x=5\)

Answer 2

(4 + x). 3^3=3^5

108+ 27x = 243

27x = 135

x = 5

Answer 3

\(\left(4+x\right).3^3=3^5\\ \Leftrightarrow4+x=3^5:3^3\\ \Leftrightarrow4+x=3^2\\ \Leftrightarrow4+x=9\\ \Leftrightarrow x=5\)

Answer 4

4+x.27=243

4 + x = 243 : 27

4 + x = 9

x = 9-4

x=5

Vậy x=5