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m in (-oo:+oo)
3/8 = 4*m-(5/12) // - 4*m-(5/12)
3/8-(4*m)+5/12 = 0
3/8-4*m+5/12 = 0
19/24-4*m = 0 // - 19/24
-4*m = -19/24 // : -4
m = -19/24/(-4)
m = 19/96
m = 19/96
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