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m in (-oo:+oo)
(1/3)*m-(3*m)-(1/8) = 509/24 // - 509/24
(1/3)*m-(3*m)-(1/8)-(509/24) = 0
(1/3)*m-3*m-1/8-509/24 = 0
-8/3*m-64/3 = 0 // + 64/3
-8/3*m = 64/3 // : -8/3
m = 64/3/(-8/3)
m = -8
m = -8
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