Posted by Kevin on Saturday, October 20, 2012 at 7:27pm.
I've attempted to do this question and I ended up with log(7-3)+log(5^2)-log(x+3)=2 but I don't what to do next or whether I did something wrong.
Math - Reiny, Sunday, October 21, 2012 at 12:18am
write is as
log((7x-3)(25)/(x+3) = 2
25(7x - 3)/(x+3) = 10^2 = 100
divide by 25
(7x-3)(x+3) = 4
7x-3 = 4x+12
3x = 15
x = 5
LS = log 32 + log 25 - log 8
= log 100
Math - Kevin, Sunday, October 21, 2012 at 1:31pm
Just wondering what did you do in this log((7x-3)(25)/(x+3) = 2 to get 25(7x - 3)/(x+3) = 10^2 = 100?
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