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m in (-oo:+oo)
4*m-((5/6)*m)+8 = 257/6 // - 257/6
4*m-((5/6)*m)-(257/6)+8 = 0
4*m+(-5/6)*m-257/6+8 = 0
19/6*m-209/6 = 0 // + 209/6
19/6*m = 209/6 // : 19/6
m = 209/6/19/6
m = 11
m = 11
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