There are six seventh parts in six seventh parts, plus () seventh parts equals the smallest prime number

There are six seventh parts in six seventh parts, plus () seventh parts equals the smallest prime number

There are six seventh parts in six seventh parts, and (1) seventh parts are equal to the smallest prime number

&Five out of seven divided by one in four plus five out of seven divided by three in four
A barrel of oil weighs 45 kg. When three fifths of it is poured out, the barrel weighs 27 kg, the barrel () kg, and the oil () kg

5 / 7 divided by 1 / 4 and 5 / 7 divided by 3 / 4 = 5 / 7 X4 + 5 / 7 X3 / 4 = 5 / 7 x (4 + 4 / 3) = 5 / 7 x (16 / 3) = 80 / 21 oil: (45-27) / (3 / 5) = 18x5 / 3 = 30 (kg) barrel: 45-30 = 15 (kg) a barrel of oil weighing 45 kg, pour out of the barrel