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m in (-oo:+oo)
3/8 = 4*m-(4/12) // - 4*m-(4/12)
3/8-(4*m)+4/12 = 0
3/8-4*m+4/12 = 0
17/24-4*m = 0 // - 17/24
-4*m = -17/24 // : -4
m = -17/24/(-4)
m = 17/96
m = 17/96
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