6(y-1.4) = 3.5y + 1.66y - 8.4 = 3.5y + 1.66y - 3.5y = 1.6 + 8.42.5y = 10y = 10 / 2.5y = 4
Ответ: y = 4
6(y-1.4) = 3.5y + 1.6
6y - 8.4 = 3.5y + 1.6
6y - 3.5y = 1.6 + 8.4
2.5y = 10
y = 10 / 2.5
y = 4
Ответ: y = 4