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m in (-oo:+oo)
7*(2*m-1)-((3/5)*m) = (6/5)*(4-(3*m)) // - (6/5)*(4-(3*m))
7*(2*m-1)-((6/5)*(4-(3*m)))-((3/5)*m) = 0
7*(2*m-1)+(-6/5)*(4-3*m)+(-3/5)*m = 0
7*(2*m-1)-6/5*(4-3*m)+(-3*m)/5 = 0
(5*7*(2*m-1))/5+(-6/5*5*(4-3*m))/5+(-3*m)/5 = 0
5*7*(2*m-1)-6/5*5*(4-3*m)-3*m = 0
88*m-3*m-59 = 0
85*m-59 = 0
(85*m-59)/5 = 0
(85*m-59)/5 = 0 // * 5
85*m-59 = 0
85*m-59 = 0 // + 59
85*m = 59 // : 85
m = 59/85
m = 59/85
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