а) (1/5) + (3/5)a + (4/5)a = (1/5) + (7/5)a = (1 + 7a)/5б) (3/7)m - (1/7)m + (5/7)m = (7/7)m = mв) (3 1/6)y + (2/3)y = (19/6)y + (2/3)y = (38/6)y + (4/6)y = (42/6)y = 7yг) (3 3/4)b - (1 7/8)b = (15/4)b - (15/8)b = (30/8)b - (15/8)b = (15/8)b = 1 7/8bд) x - (1/5)x = (5/5)x - (1/5)x = (4/5)xе) (3/5)a + a = (3/5 + 5/5)a = (8/5)a = 1 3/5a
а) (1/5) + (3/5)a + (4/5)a = (1/5) + (7/5)a = (1 + 7a)/5
б) (3/7)m - (1/7)m + (5/7)m = (7/7)m = m
в) (3 1/6)y + (2/3)y = (19/6)y + (2/3)y = (38/6)y + (4/6)y = (42/6)y = 7y
г) (3 3/4)b - (1 7/8)b = (15/4)b - (15/8)b = (30/8)b - (15/8)b = (15/8)b = 1 7/8b
д) x - (1/5)x = (5/5)x - (1/5)x = (4/5)x
е) (3/5)a + a = (3/5 + 5/5)a = (8/5)a = 1 3/5a