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m in (-oo:+oo)
8-((1/2)*m) = 16 // - 16
8-((1/2)*m)-16 = 0
(-1/2)*m-16+8 = 0
-1/2*m-8 = 0 // + 8
-1/2*m = 8 // : -1/2
m = 8/(-1/2)
m = -16
m = -16
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