SOLUTION: Solve e^-2x + 5 = 12.

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Solve e^-2x + 5 = 12.      Log On


   

Question 39442: Solve e^-2x + 5 = 12.
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
+e%5E%28-2x%29+%2B+5+=+12+
+e%5E%28-2x%29+=+7+

Now take natural logs of both sides:
+-2x+=+ln%287%29+
+x+=+%28ln%287%29%29%2F%28-2%29+
+x+=+%28-ln%287%29%29%2F2+

jon.