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(1/4)*e^2*x = 6.5 // - 6.5
(1/4)*e^2*x-6.5 = 0
1/4*e^2*x-6.5 = 0 // + 6.5
1/4*e^2*x = 6.5 // : 1/4*e^2
x = 6.5/(1/4*e^2)
x = 26*e^-2
x = 26*e^-2
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