Ответ Автор - Lyudmila2010 8.78x+(9.6-12)=-13+9.6-8.98x-8.78x + 9.6 – 12 = - 13 + 9.6 - 8.98x-8,78x + 8,98x = 9,6 – 13 + 12 – 9,60.2x = -1x = -5