Solve the logarithmic equation. log 5 + log x – log 7 = 2

Question

anonymous · Answer

by log do you mean ln()?

anonymous · Answer

log (5xX / 7) =2
5X/7 = 10^2
5X = 7x10^2
X = ?

try it :3

anonymous · Answer

lemme know if u didn't get it :D
i'll explain it ;)

whpalmer4 · Answer

Remember that adding the logs of two numbers is the same as taking the log of their product: $$\log a + \log b = \log (a*b)$$ and subtracting two logs is the same as taking the log of their quotient:$$\log a - \log b = \log (a/b)$$That is the key to understanding @feezul_93's first step.

anonymous · Answer

yeap, exactly, but i planned to let his brain work 1st, I bet he learnt it before :p

anonymous · Answer

finally my question loaded lemme work that

anonymous · Answer

attachment

anonymous · Answer

@androidonyourface we answered your question d :)

whpalmer4 · Answer

I would have led with the principles, and let him try to apply them, rather than just figuring out what you did...

whpalmer4 · Answer

I agree that he has probably seen the principles before, but easy to forget!

anonymous · Answer

i used to learnt the concept by workflow, and remembered  these thingy when people making fun of me, lol :p

anonymous · Answer

I got it thanks sorry for some reason the question goes blank then I gotta refresh to see yalls comments

anonymous · Answer

but no doubt, u're doing fine though ;)

whpalmer4 · Answer

What's your final answer?

anonymous · Answer

140 :)