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z in (-oo:+oo)
z/72.4 = 82.9 // - 82.9
z/72.4-82.9 = 0
0.01381215*z-82.9 = 0 // + 82.9
0.01381215*z = 82.9 // : 0.01381215
z = 82.9/0.01381215
z = 6001.96204067
z = 6001.96204067
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