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m in (-oo:+oo)
(2/3)*m+3 = (4/3)*m-5 // - (4/3)*m-5
(2/3)*m-((4/3)*m)+3+5 = 0
(2/3)*m+(-4/3)*m+3+5 = 0
8-2/3*m = 0 // - 8
-2/3*m = -8 // : -2/3
m = -8/(-2/3)
m = 12
m = 12
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