2e - e-2x = 0,5 * e | * 2
4e - 2 * e-2x = e | - e
3e - 2 * e-2x = 0 | + 2 * e-2x
3e = 2 * e-2x | : 2
3/2 * e = e-2x | : e
3/2 = e-2x-1 | ln
ln(3/2) = -2x - 1 | + 1
ln(3/2) + 1 = -2x | * (-1/2)
x = - (ln(3/2) + 1)/2 ≈ -0,7027325541
Probe:
2e - e1,4054651081 ≈ 1,3591409143
0,5 * e ≈ 1,3591409142
Besten Gruß