В1 Решите систему уравнений: {2x - y = -1, x / 6 + (y+1) / 5 = 1.

2x - y = -1; y = 2x + 1. x / 6 + (y+1) / 5 = 1; 5x + 6(y + 1) = 30; 5x + 6y + 6 = 30; 5x + 6y = 24; 5x + 6(2x + 1) = 24; 5x + 12x + 6 = 24; 17x = 18; x = 18 / 17; y = 2 * (18 / 17) + 1 = 36 / 17 + 17 / 17 = 53 / 17.
Ответ: x = 18 / 17, y = 53 / 17