Решите систему методом подставки: 4y-x=11 5x-2y= 17
4y - x = 11 5x - 2y = 17 4y - 11 = x 5x - 2y = 17 x = 4y - 11 5(4y - 11) - 2y = 17 20y - 55 - 2y = 17 18y = 72 y = 4 x = 4*4 - 11 x = 5 x = 5 y = 4