-4(2.3х-3)-(5-2.6х)+3(0.6х-2) Вычислить его значение при х=5/12

-4(2.3х - 3) - (5 - 2.6х) + 3(0.6х - 2) = -4(2 3/10х - 3) - (5 - 2 6/10х) + 3(6/10х - 2) = -4(23/10х - 3) - (5 - 26/10х) + 3(6/10х - 2) = -4 * 23/10х + 12 - 5 + 26/10х + 3*6/10х - 6 = -92/10х + 7 + 26/10х + 18/10х - 6 = (-92 + 26 + 18)/10х + 7 - 6 = (-92 + 26 + 18)/10х + 7 - 6 = -48/10x +1x = 5/12-48/10 * 5/12 + 1 = -48/12 * 5/10 + 1 = -4 * 1/2 + 1 = -4/2 + 1 = -2 + 1 = - (2 - 1) = -1Ответ: -1.