Question

pls give answer with explanation

3^x + 3^(x-1) = 108​

Answer 1

Answer:

Step-by-step explanation:

3^x +3^(x-1)=108

3^x + 3^x/3=108

(3)3^x + 3^x=108x3

3^x(3 +1) = 324

3^x(4)=324

3^x=81

3^x=3^4

so, x=4