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m in (-oo:+oo)
(-1/6)*m+2*m-4 = 43/3 // - 43/3
(-1/6)*m+2*m-(43/3)-4 = 0
(-1/6)*m+2*m-43/3-4 = 0
11/6*m-55/3 = 0 // + 55/3
11/6*m = 55/3 // : 11/6
m = 55/3/11/6
m = 10
m = 10
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