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m in (-oo:+oo)
(-2/3)*m+8 = 202/27 // - 202/27
(-2/3)*m-(202/27)+8 = 0
(-2/3)*m-202/27+8 = 0
14/27-2/3*m = 0 // - 14/27
-2/3*m = -14/27 // : -2/3
m = -14/27/(-2/3)
m = 7/9
m = 7/9
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