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m in (-oo:+oo)
7/9 = m/16 // - m/16
7/9-(m/16) = 0
7/9-1/16*m = 0 // - 7/9
-1/16*m = -7/9 // : -1/16
m = -7/9/(-1/16)
m = 112/9
m = 112/9
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