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m in (-oo:+oo)
(6/7)*m-(2/3) = 184/21 // - 184/21
(6/7)*m-(2/3)-(184/21) = 0
(6/7)*m-2/3-184/21 = 0
6/7*m-66/7 = 0 // + 66/7
6/7*m = 66/7 // : 6/7
m = 66/7/6/7
m = 11
m = 11
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