3. Решите уравнение: а) x + 3,12 = -5,43; б) 1 3/14 - y = 2 10/7.

а) x + 3,12 = -5,43 x = -5,43 - 3,12 x = -8,55 б) 1 3/14 - y = 2 10/7 1 3/14 - y = 2 + 10/7 1 3/14 - y = 2 + 1 3/7 1 3/14 - y = 3 3/7 17/14 - y = 24/7 -y = 24/7 - 17/14 -y = (48 - 17) / 14 -y = 31/14 y = -31/14 = -2 3/14