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m in (-oo:+oo)
3*m+5*m-(4/9) = -436/9 // + -436/9
3*m+5*m-(4/9)-(-436/9) = 0
3*m+5*m-4/9+436/9 = 0
8*m+48 = 0 // - 48
8*m = -48 // : 8
m = -48/8
m = -6
m = -6
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