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m in (-oo:+oo)
8 = 3*m-(7/4) // - 3*m-(7/4)
7/4-(3*m)+8 = 0
7/4-3*m+8 = 0
39/4-3*m = 0 // - 39/4
-3*m = -39/4 // : -3
m = -39/4/(-3)
m = 13/4
m = 13/4
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