How would you go by solving these problems to find the value of ?

1.

2.

Printable View

- Apr 12th 2008, 07:10 PMchrozerLogarithm - Solve for X
How would you go by solving these problems to find the value of ?

1.

2.

- Apr 12th 2008, 07:22 PMMathstud28
- Apr 12th 2008, 08:36 PMo_O
1. Know this identity: for any workable

So:

You should be able to simplify it form here.

2. Not sure where to go with MathStud's idea but I would just directly solve the system of equations:

Add them and solve for x. - Apr 12th 2008, 08:43 PMMathstud28here is where I was going
- Apr 12th 2008, 08:58 PMo_O
Ah I see now, going with a direct comparison.

And are we dealing with base 10 log or natural log? - Apr 12th 2008, 09:03 PMMathstud28Haha
- Apr 12th 2008, 09:21 PMchrozer
I solved for "x" and got 100, but when I plugged it back into the equation it does not equal the answer.

EDIT - NVM....I'm an idiot. Plugged the "x" value for the "y" value also. But how would you solve for "y"? I can't get the same "y" value for both equation.

MathStud - Thanx for the help...but I never learned that - Apr 12th 2008, 09:32 PMMathstud28Ok
- Apr 12th 2008, 09:53 PMchrozer
- Apr 12th 2008, 09:59 PMo_O

- Apr 12th 2008, 10:01 PMMathstud28You sure about that
- Apr 12th 2008, 10:05 PMchrozer