9/х - 9х/5х = 9/х - 9/5
х = -2; 9/(-2) - 9/5 = -(9/2 + 9/5) = - ((9*5 + 9*2)/10) = - 63/10 = -6,3
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9/х - 9х/5х = 9/х - 9/5
х = -2; 9/(-2) - 9/5 = -(9/2 + 9/5) = - ((9*5 + 9*2)/10) = - 63/10 = -6,3