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m in (-oo:+oo)
-282/5 = (4/5)*m-(6*m)+6 // - (4/5)*m-(6*m)+6
6*m-((4/5)*m)-282/5-6 = 0
(-4/5)*m+6*m-282/5-6 = 0
26/5*m-312/5 = 0 // + 312/5
26/5*m = 312/5 // : 26/5
m = 312/5/26/5
m = 12
m = 12
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