1000e^(.05X)=1
X=?
First divide both sides with 1000
so now it is e^(.05X)=0,001
now use the ln (the natural logarithm) on both sides
ln e^(0,5X)=ln0,001
0,5X=ln0,001
X=(ln0,001)/0,5
X=2 (ln0,001)
good luck
rearrange the left side, so that we have:
1000.e^(X/20)=1.............
and in a number of steps you will get:
X = -60 (log(2)+log(5))=-138.1551055......etc.
WHICH IS THE ACCURATE RESULT, BECAUSE IT =1
GOOD LUCK
+223 
