Question

Help Pleaseee!!!!
Solve 3^x – 4 = 7x + 9

Answer 1

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

Answer 2

3^x-7x=13 or 3^x=7x+13\[3^x-7x=13 OR 3^x=7x+13 \]

Answer 3

hope you like my answer

Answer 4

@bahrom7893 Bah explain Lesha how to solve this

Answer 5

i dont understand it :(

Answer 6

i got the answer you do explanation

Answer 7

@bahrom7893

Answer 8

one second Lesha bahrom7893 will explain he is pro on them

Answer 9

lol what are we doing again? I just got back from work.

Answer 10

\[3^{x – 4} = 7^{x + 9}\]\[3^x/3^4 = 7^x * 7^9\]

Answer 11

Solving Exponential Equations with Unequal Bases

Answer 12

\[3^x/7^x=7^9*3^4\]

Answer 13

We have :
\[3^{x-4}=7^{x+9}\]
By taking the natural logarithm of the two sides :
\[\ln 3^{x-4}=\ln 7^{x+9}\]
So :
\[(x-4)\ln 3=(x+9)\ln 7\]
So :
\[x\ln 3-4\ln 3=x\ln7+9\ln7\]
So :
\[x\ln3-x\ln7=9\ln7+4\ln3\]
so :
\[(\ln 3-\ln7)x=9\ln7+4\ln3\]
So :
\[x=\frac{9\ln7+4\ln3}{\ln3-\ln7}\]

Answer 14

oh man you could use lns... nevermind me, the heat wave is having adverse effects on me.

Answer 15

sooo how would i finish it to find the answer ?

Answer 16

he gave you the answer.

Answer 17

x ≈ –25.86

x ≈ –2.59

x ≈ –0.39

x ≈ –0.04

are the options ..

Answer 18

@bahrom7893 take look their is other opetions

Answer 19

By using the calculator you can get the answer :
\[\approx -25.86\]

Answer 20

thnkyou (:. can you help with one more ?

Answer 21

Solve 5^x + 5 = 9^x

Answer 22

Are you sure that the equation is like this :
\[5^x+5=9^x\]??

Answer 23

\[5^{x+5}=9^{x}\]

Answer 24

yes thats how it looks..^^

Answer 25

By the same method that I solved the previous exercise !
By taking the natural logarithm of the two sides :
\[\ln5^{x+5}=\ln9^x\]
So :
\[(x+5)\ln5=x\ln9\]
so :
\[x\ln5+5\ln5=x\ln9\]
so :
\[x\ln5-x\ln9=-5\ln5\]
So :
\[(\ln5-\ln9)x=-5\ln5\]
So :
\[x=\frac{5\ln5}{\ln9-\ln5}\approx 13.69\]

Answer 26

Omgg ii Got A Hundred ! Thankyouu Sooo Muchhhh (;: !

Answer 27

@Lesha You are welcome