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m in (-oo:+oo)
(-2/3)*m+8 = 32/3 // - 32/3
(-2/3)*m-(32/3)+8 = 0
(-2/3)*m-32/3+8 = 0
-2/3*m-8/3 = 0 // + 8/3
-2/3*m = 8/3 // : -2/3
m = 8/3/(-2/3)
m = -4
m = -4
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