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1.66*x = 1/3.81 // - 1/3.81
1.66*x-(1/3.81) = 0
1.66*x-0.26246719 = 0
1.66*x-0.26246719 = 0 // + 0.26246719
1.66*x = 0.26246719 // : 1.66
x = 0.26246719/1.66
x = 0.15811277
x = 0.15811277
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