Question

Solve `7/e^-x -4 =1` ?

Answer 1

`x=ln(5/7) ~= -0.3365`
[If the equation is interpreted as: `7/e^-x -4 =1`]

Explanation:

Since the syntax in the original question the equation may be ambigious, I will define the equation as:

`7/e^-x -4 =1`

`7/e^-x = 5`

`7e^x = 5`

`e^x = 5/7`

`x = ln(5/7) ~= -0.3365`