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m in (-oo:+oo)
m/0.32 = 0.5/0.8 // - 0.5/0.8
m/0.32-(0.5/0.8) = 0
m/0.32-0.625 = 0
3.125*m-0.625 = 0 // + 0.625
3.125*m = 0.625 // : 3.125
m = 0.625/3.125
m = 0.2
m = 0.2
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