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m in (-oo:+oo)
(4/5)*m+4/5 = 6*m-(16/45) // - 6*m-(16/45)
(4/5)*m-(6*m)+4/5+16/45 = 0
(4/5)*m-6*m+4/5+16/45 = 0
52/45-26/5*m = 0 // - 52/45
-26/5*m = -52/45 // : -26/5
m = -52/45/(-26/5)
m = 2/9
m = 2/9
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