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m in (-oo:+oo)
(1/4)*(m-2) = (2/7)*(m+4)-((1/7)*m) // - (2/7)*(m+4)-((1/7)*m)
(1/4)*(m-2)-((2/7)*(m+4))+(1/7)*m = 0
(1/4)*(m-2)+(-2/7)*(m+4)+(1/7)*m = 0
1/4*(m-2)-2/7*(m+4)+m/7 = 0
(1/4*7*(m-2))/7+(-2/7*7*(m+4))/7+m/7 = 0
1/4*7*(m-2)-2/7*7*(m+4)+m = 0
m-1/4*m-23/2 = 0
3/4*m-23/2 = 0
(3/4*m-23/2)/7 = 0
(3/4*m-23/2)/7 = 0 // * 7
3/4*m-23/2 = 0
3/4*m-23/2 = 0 // + 23/2
3/4*m = 23/2 // : 3/4
m = 23/2/3/4
m = 46/3
m = 46/3
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