Решите уравнение: 1/2х + 5/14 - 2/21 = 1 1/21 - вопрос №268565712514221112125734 от kamakoshkina 05.02.2021 23:15

Question

Математика: Решите уравнение: 1/2х + 5/14 - 2/21 = 1 1/21 - 2 5/7 + 3/4х. решите .

kamakoshkina · Answer

1/2х + 5/14 - 2/21 = 1 1/21 - 2 5/7 + 3/4х
1/2х-3/4х=1 1/21 - 2 5/7-5/14+2/21
х*(2/4-3/4)=154/294-1050/294-63/294+28/294
х*(-1/4)=-931/294
х*(-1/4)=-133/42
х=-133/42 : (-1/4)= 133/42 * 4/1=266/21=12 целых 14/21 = 12 целых 2/3