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3/4 = 3*e^-5.5*x // - 3*e^-5.5*x
3/4-(3*e^-5.5*x) = 0
3/4-3*e^-5.5*x = 0
3/4-3*e^-5.5*x = 0 // - 3/4
-3*e^-5.5*x = -3/4 // : -3*e^-5.5
x = -3/4/(-3*e^-5.5)
x = 1/4*e^5.5
x = 1/4*e^5.5
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