Question

Solve. 3^x-5 = 9

also how do i find what is x?

Answer 1

Equate the bases please.
\(\Large \color{MidnightBlue}{\Rightarrow 3^{x - 5} = 3^2 }\)

Equate the exponents.
\(\Large \color{MidnightBlue}{\Rightarrow x - 5 = 2 }\)
\(\Large \color{MidnightBlue}{\Rightarrow x = 7 }\)

Answer 2

why 2?

Answer 3

I have made an equation of the exponents.

Answer 4

ohh

Answer 5

\(\Large \color{MidnightBlue}{\Rightarrow a^m = a^n \Rightarrow m = n }\)

Answer 6

7^x - 5 = 74^x + 7
so what about that one?

Answer 7

Wait 9+5=14 so wouldn't whatever x be have to end up at 14?