уравнение 1 1/5(2/3x+1/6)=2,6

6/5(2/3х+1/6)=26/106/5*2/3х + 6/5*1/6 = 26/104/5х + 1/5 = 13/54/5х = 13/5-1/54/5х=12/5х=12/5 : 4/5х= 12/5*5/4х=3

1 1/5 (2/3х + 1/6) = 2,66/5(2/3х + 1/6) = 26/104/5х + 1/5 = 26/10 , умножим левую и правую часть уравнения на 10 . Получим : 8х + 2 = 268х = 26 - 28х = 24х = 24/8х = 3