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m in (-oo:+oo)
(2*m)/9+9/2 = 91/18 // - 91/18
(2*m)/9+9/2-(91/18) = 0
(2*m)/9+9/2-91/18 = 0
2/9*m-5/9 = 0 // + 5/9
2/9*m = 5/9 // : 2/9
m = 5/9/2/9
m = 5/2
m = 5/2
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