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m in (-oo:+oo)
(2*m+7)/6 = (5*m-2)/4 // - (5*m-2)/4
(2*m+7)/6-((5*m-2)/4) = 0
(2*m+7)/6+(-1*(5*m-2))/4 = 0
(4*(2*m+7))/(4*6)+(-1*6*(5*m-2))/(4*6) = 0
4*(2*m+7)-1*6*(5*m-2) = 0
40-22*m = 0
(40-22*m)/(4*6) = 0
(40-22*m)/(4*6) = 0 // * 4*6
40-22*m = 0
40-22*m = 0 // - 40
-22*m = -40 // : -22
m = -40/(-22)
m = 20/11
m = 20/11
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