195. Найдите значение выражения: 1) 0,6(4y – 18) – 0,4(5 – 7у) при у = 2 4/13

1. Distribute: 2.4y - 10.8 - 2 + 2.8y.
2. Combine like terms: (2.4y + 2.8y) + (-10.8 - 2).
3. Simplify: 5.2y - 12.8.
4. Substitute y = 2 4/13 = 30/13: 5.2(30/13) - 12.8.
5. Calculate: (52/10)*(30/13) - 12.8 = (4*13/10)*(30/13) - 12.8 = 120/10 - 12.8 = 12 - 12.8 = -0.8.