HELP*logs*!!!! asap please!! Solve 2 (^x + 3) = 7

Question

anonymous · Answer

$$2^{x+3}=7$$

take ln of both sides

$$ln (2^{x+3})=ln(7)$$

log rules

$$(x+3)ln (2)=ln(7)$$

$$(x+3)=ln(7)/ln(2)$$

$$(x)=ln(7)/ln(2) -3$$

anonymous · Answer

i solved that...still didnt come up with the answer.. what result did you come up with??

anonymous · Answer

well , my last line was the answer

anonymous · Answer

can you give as a decimal

anonymous · Answer

x ≈ –0.19
		x ≈ 0.94
		x ≈ –5.19
		x ≈ 2.81

anonymous · Answer

http://www.wolframalpha.com/input/?i=N%5Bln%287%29%2Fln%282%29%E2%88%923%5D

anonymous · Answer

Dude / Dudette - you need to learn to use calculator for it.

anonymous · Answer

i am using calc, just dont know how to find as decimal

anonymous · Answer

i got it, -.19

anonymous · Answer

x approximately equals 0.19 seems to be the answer.

anonymous · Answer

can u help me with my other log problem please

mathmate · Answer

Just in case, is the question
2 (^x + 3) = 7
or is it
(2^x)+3 = 7

anonymous · Answer

It is 2^(x+3)

anonymous · Answer

It is being written down in a very weird way by the person asking the question. But, that is the idea!

mathmate · Answer

Sorry, just to make sure, sometime the parentheses are added on by the poster because of the superscripts.  So there is a chance of transcription error.

anonymous · Answer

Not in this case. We confirmed.

mathmate · Answer

Oh! Thanks and sorry for the interruption.