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m in (-oo:+oo)
(2/3)*m-(3/10) = 11/30 // - 11/30
(2/3)*m-(3/10)-(11/30) = 0
(2/3)*m-3/10-11/30 = 0
2/3*m-2/3 = 0 // + 2/3
2/3*m = 2/3 // : 2/3
m = 2/3/2/3
m = 1
m = 1
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