Respuesta :

1/3 * 6^(−4x) + 1 = 6
1/3 * 6^(−4x) = 5
6^(−4x) = 15
ln(6^(−4x)) = ln(15)
−4x ln(6) = ln(15)
x = ln(15) / (−4 ln(6))
x ≈ −0.377847899

I hope this helps