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m in (-oo:+oo)
(1/4)*m+4 = 3*m-(47/2) // - 3*m-(47/2)
(1/4)*m-(3*m)+47/2+4 = 0
(1/4)*m-3*m+47/2+4 = 0
55/2-11/4*m = 0 // - 55/2
-11/4*m = -55/2 // : -11/4
m = -55/2/(-11/4)
m = 10
m = 10
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