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m in (-oo:+oo)
9*((2/3)*m+2)+4*m = 12*((5/6)*m+2)-6 // - 12*((5/6)*m+2)-6
9*((2/3)*m+2)-(12*((5/6)*m+2))+4*m+6 = 0
9*((2/3)*m+2)-12*((5/6)*m+2)+4*m+6 = 0
9*(2/3*m+2)-12*(5/6*m+2)+4*m+6 = 0
9*(2/3*m+2)-12*(5/6*m+2)+4*m+6 = 0
4*m-4*m-6+6 = 0
6-6 = 0
0 = 0
0 = 0
m belongs to the empty set
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