Question

Hellllpppp :'(
Solve 3^(x – 4)= 7^(x + 9)

Answer 1

hey angellaaa :). You seem nice, can you help me??

Answer 2

I wish I could...i did smth..but i stuck later :((
this is wht wolframalpha says though.... http://www.wolframalpha.com/input/?i=3^%28x+%E2%80%93+4%29%3D+7^%28x+%2B+9%29

Answer 3

3^(x-4)=7^(x+9)

ln(3^(x-4))=ln(7^(x+9))

xln(3)-4ln(3)=ln(7^(x+9))

xln(3)-4ln(3)-xln(7)=9ln(7)

x(ln(3)-ln(7))=4ln(3)+9ln(7)

x=(4ln(3)+9ln(7)) / (ln(3)-ln(7))

Answer 4

Thanks Sam :D

Answer 5

no problem :)

Answer 6

what the answer though ? heheh didnt get it lol

Answer 7

did you get it agela?

Answer 8

\[\ln(3^{x-4)}=\ln(7^{x+9)}\]

Answer 9

xln3-4ln3=xln7+9ln7

Answer 10

x(ln(3)-ln(7))=4ln(3)+9ln(7)

Answer 11

x(1.1-1.9)=4.39+17.51
x(-0.8)=21.9
x=21.9/-0.8
x=-27.4

Answer 12

if my opptions are:
x ≈ –0.04

x ≈ –2.59

x ≈ –25.86

x ≈ –0.39

which one is it??? :S

Answer 13

c!! since its close to it..

Answer 14

waw thnks mattthh

Answer 15

no problem, :]