If 3 to the exponent negative x is equals to 4t, express 4 to the exponent x minus 1 plus 4 to the exponent x plus 1 all over 17 times 12 to the exponent x in terms of t?

Answer 1

3^-x = 4t
3^x = 1/(4t)

Do you mean

4^(x-1) + 4^(x+1)
--------------------
17 * 12^x

or some other grouping? All those words just cloud the issue.

There's really no good way to mix the 3's and 4's as bases. I suspect a typo.

Did you maybe mean

3^-x = 4^t

??