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m in (-oo:+oo)
(4/7)*m+5 = 37/7 // - 37/7
(4/7)*m-(37/7)+5 = 0
(4/7)*m-37/7+5 = 0
4/7*m-2/7 = 0 // + 2/7
4/7*m = 2/7 // : 4/7
m = 2/7/4/7
m = 1/2
m = 1/2
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