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m in (-oo:+oo)
5-((2/3)*m) = 17/3 // - 17/3
5-((2/3)*m)-(17/3) = 0
(-2/3)*m-17/3+5 = 0
-2/3*m-2/3 = 0 // + 2/3
-2/3*m = 2/3 // : -2/3
m = 2/3/(-2/3)
m = -1
m = -1
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