Question

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Answer 1

x = 69/ 32

Answer 2

I made mistake with post!

Answer 3

I corrected it. Sorry!

Answer 4

without using logs?
i guess you have to graph it. then see if you can see where it crosses the x - axis

Answer 5

that is you should graph
\[y=3^{2x + 1} -70\]

Answer 6

Is the answer x = 1.48 correct?

Answer 7

picture i get makes it look around 2.4
http://www.wolframalpha.com/input/?i=3^%282x-1%29-70

Answer 8

in fact 2.43357 rounded

Answer 9

But its 3^2x+1. How come it became 3^2x-1?

Answer 10

i made a mistake. you are right

Answer 11

Oh, So is the answer x = 1.48?