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m in (-oo:+oo)
(5*m)/8 = 5/12 // - 5/12
(5*m)/8-(5/12) = 0
(5*m)/8-5/12 = 0
5/8*m-5/12 = 0 // + 5/12
5/8*m = 5/12 // : 5/8
m = 5/12/5/8
m = 2/3
m = 2/3
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