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m in (-oo:+oo)
(1/2)*m-(1/2) = (1/6)*m+1/2 // - (1/6)*m+1/2
(1/2)*m-((1/6)*m)-(1/2)-(1/2) = 0
(1/2)*m+(-1/6)*m-1/2-1/2 = 0
1/3*m-1 = 0 // + 1
1/3*m = 1 // : 1/3
m = 1/1/3
m = 3
m = 3
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