12x(x-5) - (6x+1)(2x-3) = 4712x^2 - 60x - (12x^2 - 18x + 6x - 3) = 4712x^2 - 60x - 12x^2 + 18x - 6x + 3 = 47
-60x - 6x + 18x = 47 - 3-48x = 44x = -44/48x = -11/12
Ответ: x = -11/12.
12x(x-5) - (6x+1)(2x-3) = 47
Упрощаем уравнение:12x^2 - 60x - (12x^2 - 18x + 6x - 3) = 47
12x^2 - 60x - 12x^2 + 18x - 6x + 3 = 47
-60x - 6x + 18x = 47 - 3
-48x = 44
x = -44/48
x = -11/12
Ответ: x = -11/12.