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m in (-oo:+oo)
1/3-((1/2)*m) = 43/66 // - 43/66
1/3-((1/2)*m)-(43/66) = 0
(-1/2)*m+1/3-43/66 = 0
-1/2*m-7/22 = 0 // + 7/22
-1/2*m = 7/22 // : -1/2
m = 7/22/(-1/2)
m = -7/11
m = -7/11
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