Question 734196
Hello, 
1.2 e^(-5x) + 2.6 = 3 
first try to get rid of 2.6 from the left side, 
subtract 2.6 from the left side , 
1.2 e^(-5x) = 3 - 2.6 
1.2 e^(-5x) = 0.4
now divide 1.2 on both sides
e^(-5x) = 0.4 / 1.2 
e^(-5x) = 1/3 
take log on both sides , we have 
-5x = log ( 1/3) 
-5x = -0.4771
now divide by -5 on both sides, we get :
x = 0.0954 

Thanks & best Regards 
Vidya P