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m in (-oo:+oo)
-6*m-(4*m)-2 = 58 // - 58
-6*m-(4*m)-58-2 = 0
-6*m-4*m-58-2 = 0
-10*m-60 = 0 // + 60
-10*m = 60 // : -10
m = 60/(-10)
m = -6
m = -6
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