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m in (-oo:+oo)
(7/8)*m-2 = (-15/16)*m+3 // - (-15/16)*m+3
(7/8)*m-((-15/16)*m)-3-2 = 0
(7/8)*m+(15/16)*m-3-2 = 0
29/16*m-5 = 0 // + 5
29/16*m = 5 // : 29/16
m = 5/29/16
m = 80/29
m = 80/29
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